how does the lens of a light microscope work

Answers

Answer 1

Light from a mirror is reflected up through the specimen, or object to be viewed, into the powerful objective lens, which produces the first magnification. The image produced by the objective lens is then magnified again by the eyepiece lens, which acts as a simple magnifying glass.

Answer 2

Answer:

Reflection and magnification

Explanation:

A light microscope reflects and enlarges an image from a specimen. The specimen can be anything. It can be a plant cell, animal cell or in most advanced cases, small organisms such as viruses.

The light microscope depends on light. The light can be artificial or electric light. The light is shot through the specimen. It is reflected on the primary lenses. This light is reflected and magnified on the secondary lenses. This produces a magnified image.


Related Questions

1.) You should keep an updated list of emergency phone numbers in your wallet when you live in an earthquake prone area.
A.) True
B.)False

2.) You should do all of the following after an earthquake EXCEPT ________________.

A.) only use your cell phone for emergencies

B.) listen to a battery-operated radio or TV to keep updated

C.) help the injured and trapped people if you can do so safely

D.)relax, since it is all over after the main earthquake

3.) The image is of a fault. There is a large incidence of recent earthquakes between locations 1-4 and 6-8. Two hundred years ago, there were many earthquakes in the areas of 5 and 9. Which of the following is true about the image?

A.) Area 5 may be the areas of future earthquakes.

B.) Areas 5 and 9 are seismic gaps.

C.) Area 9 may be the areas of future earthquakes.

D.) All of the above.

Answers

1. True

2. D

I'm not sure about the third question, but maybe c?


1. True

2. D

Maybe try B

A person had bread and butter for his breakfast. Trace the changes in the main components of these during its passage through the alimentary canal

Answers

When the bread and butter is in mouth, mechanical digestion starts. The size of the food gets reduced and it mixes with saliva for easy swallowing. The salivary amylase in saliva begins the digestion of starch in the bread. This is the start of chemical digestion. When the undigested bread and butter reached the stomach, lower esophageal sphincter relaxes and allow the chewed food to enter. The gastric secretions containing HCl, acts on the undigested food to produce chime. HCl kill the microorganism on the food and also denatures the protein and later attacked by digestive enzyme pepsin. Pepsin breakdown protein in the bread, butter . Later on gastric lipase begins to digest fat present in butter. Digestion of the starch in bread does not occur in the stomach because the salivary amylase that began chemical digestion in mouth became inactive in the presence of HCl. Further the chime enters the small intestine where bile secreted by the gall bladder emulsifies the fat and break into small globule which helps in fat absorption.

cross between a plant with red flowers (R = dominant) and a plant with white flowers (r = recessive) yielded 47 plants with red flowers and 51 plants with white flowers. What are the genotypes of the parent plants? Explain.

Answers

Final answer:

The parents are likely heterozygotes (Rr x Rr) because the offspring have a roughly 1:1 ratio of dominant (red) to recessive (white) characteristics. This is evident after performing a Punnett square analysis.

Explanation:

The subject question falls under the category of Mendelian genetics. In the cross you mentioned, almost half the offspring produced are of the dominant phenotype (Red flowers), and half are of the recessive phenotype (White flowers). This suggests a cross between parents that are both heterozygotes (Rr), which produces an approximately 1:1 phenotypic ratio in the offspring.

Using a Punnett square, we set up the cross Rr (Red flower parent) x Rr (Red flower parent). This cross yields the following genotypes in the offspring: 1 RR (Homozygous Dominant red), 2 Rr (Heterozygous red), and 1 rr (Homozygous recessive white). As the recessive phenotype can only be expressed in the rr genotype, this is why we see an approximate 1:1 ratio of red to white flowering plants in the offspring.

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Which of the following is best definition of technology
A.The most recent electronic devices , B.Practical applications of scientific knowledge, C.The pursuit of scientific knowledge, D.The scientific process

Answers

B Practical applications of scientific knowledge.

B Practical Applications of Science

What is the name if the process in which tRNA is involved in making proteins?



Translation
Transcription
Mitosis

Answers

Translation

tRNA is bound to amino acids. It binds to the corresponding mRNA codons in the ribosome. The amino acid is then added to the polypeptide.

Final answer:

The process in which tRNA is involved in making proteins is Translation. Here, tRNA decodes the mRNA sequence into a protein, contributing to the peptide chain one amino acid at a time.

Explanation:

The process in which tRNA is involved in making proteins is known as Translation. During this process, the tRNA (transfer RNA) decodes the mRNA (messenger RNA) sequence into a protein. Each tRNA carries an amino acid that matches the codon it reads on the mRNA. As the mRNA moves through the ribosome, the tRNA adds its amino acid to the growing peptide chain, building the protein one amino acid at a time.

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why is biomass a better alternative to oil?

Answers

This is because biomass is renewable. A new crop can be grown after each harvest, and biomass has  low carbon fuel.

Answer:

Explanation:

A biomass is a source of thermal energy. It is obtain from burning of the plant and animal material. The materials include the wood, waste obtain from the agriculture land like straw, animal dung and even from the human waste like sewage waste.

Biomass is an alternate source of energy. As the biomass is a renewable source of energy and the oil can be a fossil fuel like crude oil including petroleum, which is a non-renewable source of energy. The biomass energy can be replenished as the plants and animal material can be replenish by the natural cycles. Their quantity will never deplete in nature and they will remain available for the present as well as for the future generation. Whereas, the quantity of oil may deplete in nature as being a non-renewable resource the oil can only be used once and the used amount will not be recovered in any accessible way.

which of these factors would most likely strengthen the effetiveness of CITES
A. Interest in biodiversity conservation
B. Political interest

Answers

D. Funding for on-the-ground enforcement

Final answer:

CITES' effectiveness is likely to be more directly strengthened by the increased interest in biodiversity conservation. This focus leads to more policy implementations, public awareness, and compliance. Political interest also plays a role, but its impact might not always be positive.

Explanation:

Both factors mentioned could strengthen the effectiveness of Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES), depending on the context. However, increased interest in biodiversity conservation would more likely have a direct impact. The strength of CITES relies on the commitment of countries and individuals to prioritize biodiversity and act accordingly. This interest leads to policy implementations, public awareness, and compliance with regulations, all of which bolster CITES' effectiveness.

Conversely, while political interest has a role to play, it might not always correlate positively with CITES' effectiveness. Political interest can swing in different directions based on a variety of influences, potentially including policies or attitudes that can undermine conservation efforts.

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which organelle makes the proteins that are needed by the cell

Answers

RIbosomes

The rough endoplasmic reticulum is where most protein synthesis occurs in the cell. The function of the smooth endoplasmic reticulum is to synthesize lipids in the cell. The smooth ER also helps in the detoxification of harmful substances in the cell. Ribosomes- Organelles that help in the synthesis of proteins.

What is the difference between a trade-off and an opportunity cost

Answers

when we sacrifice one thing to obtain another, that's called a trade-off

Opportunity cost is an economic concept which used to discuss choice.


Answer and Explanation

Trade off is the compromise but the opportunity cost is the loss of the things which is not taken. It is the way which is not considered. Trade-offs generate opportunity costs. When we create a trade-off, the point which we do not prefer is our opportunity cost. Hence in an individual's life, everything has opportunity costs. A trade-off means the possibility that is given up, to accomplish what is wanted. While, the opportunity cost is the cost of the second desirable option given up to obtain a decision.

Which structure in your body is responsible for nerual communication?
a.brain
b.neuron
c.muscles
d.both a and b

Answers

B. Neurons
This is because they are neutral

Final answer:

Neural communication is facilitated by neurons, with the central nervous system, consisting of the brain and spinal cord, acting as the main control center. The right answer to the question is 'd. both a and b.'

Explanation:

The structure in your body responsible for neural communication is the neuron. The central nervous system (CNS), which consists of the brain and the spinal cord, is the main control center for neural communication. Neurons are specialized cells that transmit electrical signals throughout the nervous system. The axon of a neuron is the part that transmits electrical signals to target cells. These signals often need to cross synaptic gaps to reach other neurons, which is where neurotransmitters come into play, enabling communication between neurons.

In the context of choices provided in the question, both the brain (a) and neurons (b) are integral to neural communication. Therefore, the correct answer would be 'd. both a and b.'

The introduction of zebra mussels in the Great Lakes is an example of which type of release? The introduction of zebra mussels in the Great Lakes is an example of release.

Answers

it has been deduced that larval mussels was released to the Great Lakes during the ballast exchange of a cargo ship from the Black Sea.  so it is an example of un-intentional release.


Final answer:

The introduction of zebra mussels in the Great Lakes is an example of an invasive species release via ballast water from ships, which has both economically impacted human infrastructure and dramatically changed the local ecosystem.

Explanation:

The introduction of zebra mussels in the Great Lakes is an example of an invasive species release. This occurred when ships released ballast water into the lakes from their tanks, which were filled in European ports. The water used for ballast, which helps stabilize the ships during transport, contained living organisms including zebra mussels. Once introduced to the Great Lakes, zebra mussels have cost millions in cleanup expenses to maintain water intakes and other structures and have significantly altered the ecology of the ecosystem. They are filter feeders that have improved water clarity, but they also threaten native mollusk populations and have benefited certain fish species like the smallmouth bass.

why do body cells need gluecose

Answers

Cells require energy to power their biochemical processes. The power currency of cells is ATP. ATP is made through cellular respiration (glycolysis and Krebs Cycle). Glucose is the main substrate used by cells from which energy is derived. Its bonds are broken down by enzymes and the energy used fo make ATPs.

which organelles must be present within a cell of a generanium leaf for respiration and photosynthesis to occur?

Answers

In order for photosynthesis to occur, the plant will need to possess chloroplasts, and for respiration, there will need to be mitochondria present.

For respiration and photosynthesis to occur in generanium leaf cells, chloroplasts are required for photosynthesis, capturing light energy to produce food, and mitochondria are necessary for respiration, converting stored sugars into usable energy. These two organelles are essential for the plant's growth and energy needs.

For respiration and photosynthesis to occur within a cell of a generanium leaf, two key organelles must be present: the chloroplasts and the mitochondria. Chloroplasts are essential for photosynthesis, the process by which plants, algae, and some bacteria convert light energy into chemical energy. Inside chloroplasts, photosynthesis begins with the absorption of sunlight by the green pigment chlorophyll, which is embedded in the thylakoid membranes. These organelles have their own DNA and ribosomes, supporting the endosymbiotic theory that chloroplasts were once independently living bacteria.

On the other hand, the mitochondria are central to the process of respiration, whereby sugars produced during photosynthesis are metabolized with oxygen to produce energy, carbon dioxide, and water. This process is essential for the plant's growth and development, functioning within the mitochondria, often referred to as the cell's power plant due to its role in energy production. All cells contain numerous mitochondria to meet their energy requirements.

Thus, chloroplasts and mitochondria play integral roles within plant cells, orchestrating the complementary processes of photosynthesis and respiration vital for the plant's survival.

Please Help. WILL MARK BRAINLIEST!!!!!!

Answers

I believe the answer is: Decreases because the number of prey decreases.

As shown on the chart, the line of the alligators population stay the same, while mosquito's population decreases. This would cause a decrease in the cricket frogs population because of the decrease of food source, as well as the population numbers of prey and predators not being balanced.

I'd say the cricket frogs' population would decrease as mosquitoes' population decreases. Since the number of mosquitoes (which are a more than usual food sources for cricket frogs) is decreasing through out the years. So that'd mean there's less food each year for them and even lesser food the year after that. Let's also add that the same amount of predators hunting them for food is the same each year. If anything that'd further hurt and ensure the decrease of the cricket frogs' numbers rather than help keep their numbers at a constant rate let alone an increasing rate (especially if other variables are not accounted for or presented that could too influence the change of population for the cricket frog, which is true in this case. We are only supplied the information of the cricket frog's prey population rates per year as well as its predators'. Solely from that, we need to infer what change in the population of cricket frogs would be true for this question in this case.)

A and B makes no sense because the predators' population (alligators) aren't increasing or decreasing to begin with according to the graph (instead it is remaining the same number each year). So we can throw that out. D wouldn't be it. If a food source decreases, what depends on said food source probably will as well because that's less food available for them to survive.

What gas is removed from the atmosphere during photosynthesis

Answers

Carbon Dioxide

The process of photosynthesis is the exact opposite of the process of respiration. Therefore, pants "breathe in" carbon dioxide and "breathe out" oxygen.

Final answer:

During photosynthesis, green plants remove carbon dioxide from the atmosphere and convert it into glucose and oxygen. This process helps maintain the balance of gases in the Earth's atmosphere and is crucial for the survival of many organisms.

Explanation:

The gas that is removed from the atmosphere during the process of photosynthesis is carbon dioxide. In this process, green plants convert carbon dioxide and water into glucose and oxygen, using the energy from sunlight. The oxygen is released back into the atmosphere while the glucose is utilized by the plant for energy and growth.

This photosynthesis process plays a crucial role in maintaining the balance of oxygen and carbon dioxide in the Earth's atmosphere. The carbon dioxide that is produced by the metabolic processes in animals and in some plant processes is used by the plants during photosynthesis, effectively recycling it. This also results in the release of oxygen into the atmosphere, which is vital for the survival of many organisms, including humans.

While photosynthesis primarily results in the removal of carbon dioxide from the atmosphere, it also indirectly affects the levels of other gases. For instance, by producing oxygen, it influences the levels of gases that can react with oxygen, such as nitrous oxide and methane.

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Help me any answer will be good

Answers

I think the answer is C sorry if i got i wrong.

Yeah I think the answer is C

Hope this helps! :)

Why is taking care of yourself a time management techique

Answers

it hepls you to be less stressed so you can do later allthe tasks left for you to be done

Self-care is crucial for effective time management as it helps maintain peak productivity, avoids procrastination, and sustains personal wellness. It is a strategy that allows for a healthy work-life balance, making you more efficient in managing your responsibilities.

Taking care of yourself is an essential time management technique because it helps to ensure that you are functioning at your best when you are working on tasks. Feeling stressed can significantly impact your mental and physical health, leading to burnout and decreased productivity. By integrating self-care into your schedule, you make it possible to work more efficiently, avoid procrastination, and manage your personal wellness.

Effective time management strategies involve establishing a routine for regular self-check-ins to identify and prioritize tasks. This planning helps to prevent the pressure that comes from having to react to unexpected situations. By doing so, you can optimize your productivity while also carving out necessary time for relaxation and health maintenance.

The act of taking care of yourself should not be seen as a luxury, but rather as a critical component in the overall strategy of managing time and responsibilities. By allowing for personal time to deal with life's urgent and important matters, you can maintain a healthy balance between work, study, and personal life.

choose one strip of seafloor rock. what is the age of the rock?

Answers

it looks like the ages are already given. 20 to 156 million years old

Sandy puts a paper clip on the table and puts a magnet near the paper clip. The paper clip begins to move. What type of forces are acting on the paper clip?

Answers

Answer:

Its D unbalanced

Explanation:

because it cant be only magnetic you have to involve gravity motion all that and the paper clip is being pulled so it cant be even so its unbalanced

Answer: Unbalenced

Explanation:

Study island

Help ME QUICK!

It is possible that an area could have soil that is chemically unrelated to the native bedrock beneath it. true or false

Answers

(true or false) It's possible that an area could have soil that is chemically unrelated to the native bedrock beneath it.  That would be False


The answer is false

"A basic life form happened to arise from nonliving matter" is a definition of .

Answers

Answer:

The answer is evolution.

bones function as levers for the muscles to provide movement of the body What refers to reducing the angle of the joint thus bringing two bones closer together


PLEASE HELP

Answers

Flexors is your answer.

Hope this helps!

-Payshence

What are the 3 stages of cellular respiration?

Answers

The three main stages of cellular respiration (aerobic) would include Glycolysis in the cytoplasm, the Kreb's Cycle in the Mitochondrial Matrix and the Electron Transport Chain in the Mitochondrial Membrane.

Cellular respiration consists of glycolysis, the Krebs Cycle, and the electron transport chain. These stages work together to convert glucose and other organic molecules into ATP, which cells use as a source of energy for various biochemical processes.

1.Glycolysis: Glycolysis is the first stage of cellular respiration, and it takes place in the cytoplasm of the cell. During glycolysis, a single molecule of glucose is broken down into two molecules of pyruvate.

This process doesn't require oxygen and is therefore considered anaerobic. It yields a small amount of ATP and some molecules of NADH (nicotinamide adenine dinucleotide), which carry high-energy electrons.

2. Krebs Cycle (Citric Acid Cycle): The Krebs Cycle, also known as the citric acid cycle or TCA cycle, occurs in the mitochondria. In this cycle, the two molecules of pyruvate generated in glycolysis are further broken down. This stage is aerobic, meaning it requires oxygen.

For each pyruvate, it produces three molecules of NADH, one molecule of FADH2 (flavin adenine dinucleotide), one molecule of ATP, and carbon dioxide as waste.

3. Electron Transport Chain (ETC): The final stage of cellular respiration is the electron transport chain, which also takes place in the mitochondria. The high-energy electrons carried by NADH and FADH2 from glycolysis and the Krebs Cycle are passed through a series of protein complexes, creating a flow of protons (H+) across the inner mitochondrial membrane. This proton gradient generates a strong electrochemical gradient, and the flow of protons back through the ATP synthase enzyme results in the production of a significant amount of ATP.

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A typical ecosystem like the one pictured here might have 200,000 caterpillars, 10000 frogs, 500 snakes, and 35 owls. Why do you think there are fewer and fewer organisms at each level of the food chain?

Answers

This is due to the inefficiencies of passing energy from one energy level to the next. Studies have shown that only 10% of energy is passed from a lower trophic level to the next higher level as biomass. The rest is lost in inefficiencies such as heat.  This is why the graphical model of energy flow in a community is shaped like a pyramid with the lowest energy levels at the bottom and highest energy levels at the top.

Identify the phases of Meiosis II described below. Chromosomes are lined up by spindle fibers. Nuclear envelope forms around each set of DNA. Sister chromatids are pulled apart. Centromeres move toward the poles of the cell.

Answers

Answer:

1. Metaphase II - Chromosomes are lined up by spindle fibers.

2. Telophase II - Nuclear envelope forms around each set of DNA.

3. Anaphase II - Sister chromatids are pulled apart.

4.  Prophase II - Centromeres move toward the poles of the cell

Explanation:

Final answer:

The phases described are Metaphase II (chromosomes lined up), Anaphase II (sister chromatids separated), and Telophase II (nuclear envelope forming around DNA). These processes occur during Meiosis II, a type of cell division which results in four haploid cells.

Explanation:

The phases of Meiosis II as described in your question are as follows:

Metaphase II: This is the phase where the chromosomes, coordinated by spindle fibers, are arranged in a line along the middle of the cell.Anaphase II: In this phase, sister chromatids are pulled apart and directed towards opposite ends of the cell.Telophase II: During this phase, a nuclear envelope forms around each segregated set of DNA and the centromeres move towards the poles of the cell. This is usually accompanied by cytokinesis, the process by which the cell itself is divided to form new cells.

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Which mechanism do the different organism populations found across the tundra exemplify?

Answers

In the Tundra region, the diversity of the organisms present is high. Multiple different species of different organisms are present in these regions, which makes them a diverse area on the Earth. The mechanism responsible for these different populations is the species diversity.


It can be defined as the total number of species that are present in a given community.

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Cell-to-cell communication is absolutely essential for multicellular organisms. But how do plants communicate when their cells are surrounded by cell walls? Plants use __________ for long-distance signaling, such as ethylene which promotes fruit ripening and regulates growth. A) hormones B) ions C) neurons D) phospholipids

Answers

Ans.

Cell-to-cell communication allows signalling of essential substances between the plant cells, which are surrounded by cell walls. The molecules used by plants for long-distance signalling are known as hormones, such as auxin, ethylene, and gibberelin.

These hormones are secreted by one plant cell and received by another plant cell, where it exerts it affect. Thus, the correct answer to be fill in the blank is 'option A). hormones.'

A potted plant is placed inside a clear, sealed vacuum container that has water pumped into it on a regular basis. The container is placed in the sun and the plant's growth is monitored. Which statement best described what will most likely happen to the plant over time?

Answers

The plant will die because it will run out of air bace it did not say air was pumped in it only water so there is only a sertain amount of air and it could get to much water as well.


A potted plant placed inside a clear, sealed vacuum container with regular water addition and sunlight exposure will likely undergo photosynthesis and grow, assuming all necessary conditions for plant life are maintained.

The question focuses on the growth of a potted plant inside a clear, sealed vacuum container in which water is regularly added, and the plant is exposed to sunlight. Over time, the plant will likely carry out photosynthesis due to the presence of sunlight and water. These conditions typically enable the plant to produce its own food and energy, leading to growth.

Water movement is crucial for plant survival and growth. In most situations, water will move from the soil to the plant due to osmotic pressure, which is determined by the water potential difference between the plant and its environment. Under drought conditions, a plant's stomata may close to conserve water, but in this scenario, with regular water provision, the plant can maintain open stomata for gas exchange, necessary for photosynthesis.

Juan has collected a cricket. Which question can a dichotomous key help him answer?

Answers

What type of cricket it is

Which species of cricket is this?

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Newton’s 1st law of motion states that a moving object will go in a straight line unless an outside force changes this motion. What outside force prevents supply planets from moving in a straight line into space?
-gravity
- meteorite impacts
- supernovas
-Nuclear fusion

Answers

i think that is is gravity becasue gravity pulls the planets

I would say that gravity from other planets and the sun prevents supply planets from moving in a straight line into space.

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HELP PLEASE! solve for x and y. Why is the bill of rights an example of of limited government Write the equation of a line in slope intercept form that is parallel to 2x + 4y = 10 and passes through the point (8, 2).A) 16x + 8y = 10B) y = 12x + 6C) y = 12x+2D) y=8x + 2 White families who moved into gentrified communities usually professed liberal attitudes toward people of color. therefore, gentrification failed to increase the dialogue between the new white residents and the former black residents because: what patterns do you notice? describe three patterns The functions f(x) = (x + 1)^2 - 2 and g(x) = -(x-2)^2 + 1 have been rewritten using the completing-the-method. Is the vertex for each function a minimum or a maximum? Explain your reasoning for each function. chloe made a conjecture that given any two numbers, the greater number can always be arranged into more arrays. State whether you agree or disagree. Then explain why you think so by giving an example of two numbers that prove or disprove the conjecture. Explain why your senses would lead you to believe that the Earth is center of the universe divisibility rule for 4. Shelly types 301 words in 3 1/2 minutes what is the rate at which Shelly types in words per minute The type of economic system in which all things are government owned is communism Bailey has an hour to get ready for school he spends 3/6of that time getting dressed she spends 1/4of that time eating breakfast Bailey spend more time getting a dress or eating breakfast Which of the following inequalities matches the graph? Based on the polynomial reminder theorem, what is the value of the function when x= -5F (x)= x^4 + 12x^3 + 30x^2 - 12x + 70 A motorist traveled 250 miles on 11 gallons of gas. With the same vehicle, about how far could he go on 16 gallons of gas? Round to the nearest tenth. An airplane flies 810 km in 1.5 hours. Find the constant of variation. Please help ASAP!!!!!!Read the following quotation and then answer the question."I got some chocolates," Mr. Thomas said. "Don't like 'em myself. Here you are. Not enough to go roundThe gang was puzzled and perturbed by this action and tried to explain it away..."We'll show him we don't take bribes," Blackie said, and they sacrificed the whole morning to the game of bouncing that only Mike was young enough to enjoy.The quotation above describes Blackie as what type of gang leader?A.violent and over-bearingB.influential and unwilling to back down during conflictC.a strong negotiatorD.unwilling to accept discipline from anyoneWhich of the following quotes from "The Destructors"bestsupports the answer selected above?A."Blackie gave a single hoot of laughter and then, like Mike, fell quiet, daunted by the serious implacable gaze"B.He went away to the back of the ca agreement made to settle dispute over state representation in the legislature Match the following items by evaluating the expression for x = -6. A person who is a megalomaniac has a mental disorder characterized by delusions of _________. Steam Workshop Downloader