The right answer is a. structures smaller than cells.
In the transmission electron microscope, electrons are emitted by heating a tungsten filament (or crystal of lanthanum hexaboride). These electrons are then accelerated with a voltage of between 200 and 1000 kV (1000 kV for the most expensive). Once the vacuum is in the cell, the electron beam is passed through a sample about 3 mm in diameter and less than 20 nanometers thick. Then this beam is focused with the help of magnetic lenses towards the screen or the photographic plate.
The operation of M.E.T is analogous to that of an optical microscope.
In light microscopy, a beam of photons is sent through a sample. This beam is then focused through optical lenses to the image plane of the lens. An enlarged image of the sample is observed.
Which geographic features are associated with a divergent boundary?
Answer:
Tectonic plates.
Explanation:
At the divergent boundaries, two plates move away from each other and the space produced by this spacing is filled by a new magmatic crust material. Thus, the divergent limit is constructive, since it allows the expansion of the ocean floor and the consequent formation of a new lithosphere.
According to this concept, we can say that the geographical features that are associated with a divergent boundary are the tectonic plates.
A farmer wants to buy a new farm. The first farm he looks at has soil that is made up of light-colored sand. The second farm he looks at has fields of red clay. Finally, the third farm he looks at has soil of black loam. Which farm should the farmer buy if he wants to choose the one that will be the best for growing crops? A) farm with red clay B) farm with black clay C) farm with sandy soil D) farm with black loam
Farm with black loam will be the best for growing crops. So, the correct option is D.
What is Loam?Loamy soil is defined as a soil that is composed mostly of sand, silt and a small amount of clay. By weight, its mineralogical composition is approximately 40–40–20% concentration of sand–silt–clay, respectively.
Loam describes a specific type of soil that has been prepared from a mixture of sand, silt, and clay, while sandy loam soil is a very desirable medium used by farmers, gardeners, landowners, and property owners because It has very beneficial properties.
This soil is good for most garden plants because it holds plenty of moisture but also drains well so that sufficient air can reach the roots
Thus, farm with black loam will be the best for growing crops. So, the correct option is D.
Learn more about Soil, here:
https://brainly.com/question/17146975
#SPJ6
Which part of the cell does this illustration represent?
the resistance of a mineral to being scratched is called_____?
A. streak
B. Fracture
C. Hardness
D. Cleavage
you answer is going to be hardness because the strength of the mineral is being put to the test
hope this helps
how is a well designed investigation developed
What is the function of the organelle identified as #6 in the picture (it is mostly brown, folded over, and is in the lower right part of the cell)?
A) movement
B) houses the cells DNA
C) house the digestive enzyme
D) packages proteins for transport out of the cell
Number 6 in the picture is clearly Golgi apparatus. It is a membrane bound organelle with long cisternae like structure. After the protein synthesis occurs in rough Endoplasmic reticulum, they are further packed and transported by Golgi apparatus.
8. If you were given a slide containing living cell from an unknown organism, how would you identify the cells as either plant or animal?
Answer:
The cell can be identify by looking at their shape.
Explanation:
Plant cells have cell walls outside the cell membrane. Animals cells doesn't have any cell wall.
The shape of plant cells are generally square or rectangle. The slide contains cells with square shape cells, that means the cells are plant cells. If the slide has oval or round shape cells , the cells are animal cells. Large vacuoles are visible only under the slides of plant cells.
Thus, the difference on the basis of cell shape and vacuoles can be used to identify plant and animal cells.
Cells are the living entities, which are the structural, basic, and functional units of all living beings. The eukaryotic cell can be divided into plant cells and animal cells.
The difference between the plant cell and animal cell are:
An animal cell is a eukaryotic cell, with membrane-bound organelles and an eccentric nucleus. The animal cell consists of the cell organelles centrosomes, lysosomes, ribosomes, Golgi apparatus, mitochondria, cytoplasm, and cell membrane. The plant cell is a eukaryotic cell with an eccentric nucleus and comprising the organelles like cell walls, chloroplasts, vacuoles, and other membrane-bound organelles.
Thus, the person can identify the plant cell and animal by the presence of cell walls in the plant cell.
To know more about animal cells and plant cells, refer to the following link:
https://brainly.com/question/545622
which of the following might show evidence of a year with low rainfall
Evidence of low rainfall in a specific year can be identified through decreased agricultural outputs, thin tree rings indicating stressful growing conditions, and historical climate events associated with dry conditions such as the Little Ice Age.
Explanation:Evidence of a year with low rainfall can be seen in several aspects of our environment. Some of the clearest indicators may be observed in agricultural output, tree ring records and historical climate events.
First, significant droughts can impact agricultural production sharply. For instance, in 2014, the Manchuria Plain in China experienced its intense drought in 50 years, resulting in a dramatic decrease in wheat, corn, and soybeans supplies. Thus, in years with low rainfall, we may expect to see a decline in the amount of agricultural products supplied at any given price.
Secondly, nature provides its own historical record through annual tree rings. These rings can reveal prevailing climatic conditions during each growing season. A thin ring usually suggests low rainfall or high temperature stress which impaired growth.
Lastly, major historical climate events, like the Little Ice Age in Europe in the fourteenth century is characterized by cold weather and, in some areas, droughts which reduced available food supplies due to low rainfall.
Learn more about low rainfall here:https://brainly.com/question/29232932
#SPJ12
“If oxygen is NOT present, glycolysis is followed by ____________.”
Fill
In
The
Blank
In the absence of oxygen, the process that follows glycolysis is fermentation. It is an anaerobic process with two types: lactic acid fermentation and alcoholic fermentation.
Explanation:If oxygen is not present, the process that follows glycolysis is known as fermentation. Fermentation is an anaerobic process, which means it occurs in the absence of oxygen. Fermentation allows glycolysis to continue by producing the NAD+ needed for this pathway. There are two types of fermentation: lactic acid fermentation and alcoholic fermentation. Muscle cells in the human body, when lacking sufficient oxygen during exercise, will perform lactic acid fermentation while yeast cells perform alcoholic fermentation.
Learn more about Fermentation here:https://brainly.com/question/34147052
#SPJ6
Which statement best describes the plasma membrane? It is selectively permeable to certain substances. It is nonpermeable to substances outside of the cell. It is freely permeable to all substances. Its rigidity does not allow materials to enter the cell.
Which of the following statements are true of atp
Final answer:
ATP, known as the energy currency of the cell, transfers energy to cell processes and releases that energy upon breaking the bond between its second and third phosphate groups. The correct option is b.
Explanation:
The correct statement about Adenosine triphosphate (ATP) is that it transfers energy to cell processes. ATP is often referred to as the energy currency of the cell, as it stores the energy derived from the catabolism of nutrients, like glucose and fats, and releases it to power various cellular functions. ATP consists of an adenosine molecule attached to three phosphate groups; when it is used for energy, the bond between the second and third phosphate groups is broken, resulting in the formation of ADP (Adenosine diphosphate) and a release of energy. This process is known as phosphorylation, where the third phosphate group is temporarily attached to another molecule, often to activate or deactivate it or to enable it to participate in a subsequent reaction. Hence, Option b is accurate.
what is a process that occurs only in the biosphere
The process that occurs only in the biosphere is transpiration. The correct option is D.
What is a biosphere?Biosphere is a place of the earth where the life exists. The biosphere include the land, water, soil, and air, where the life exists. Main components for life is oxygen and water, and in biosphere contain oxygen and water.
Transpiration is a process of water loss from the leaves and stems of the plant. When the water in the plant become excess then plant starts to remove excess water.
Transpiration can only happen in the biosphere because transpiration occurs by plants and plants only present in the biosphere.
Thus, the correct option is D. Transpiration.
To learn more about biosphere, refer to the link:
https://brainly.com/question/13344563
#SPJ6
Your question is incomplete. The most probably complete question is given below:
condensation
infiltration
precipitation
transpiration
One of the five characteristics of life is the need for energy. Which of the four basic needs meets this need? water
air
food
a place to live
Which of the following cells would the cycle be shortest?
A. An Adult Brain Cell
B. An Embryonic Cell
C. A Teenager’s Kidney Cell
D. An Unfertilised Egg Cell
Extension - Suggest a reason for your answer
absorption is the process by which nutrients move into the bloodstream
true or false
A plant dying after being exposed to poison represents a physical change true or false???
The statement is false because a plant dying from exposure to poison is an example of a chemical change, as it involves a change in the plant's chemical composition, not just a physical alteration.
Explanation:The question: A plant dying after being exposed to poison represents a physical change, true or false?. False. This statement is false because a plant dying from poison represents a chemical change, not a physical one. This is due to the alteration of the chemical structure within the plant as a result of the poison, which causes damage or death to the plant. For instance, when a toxic agent like poison interacts with a plant's biological systems, it can lead to a series of biochemical reactions that ultimately cause the plant cells to die, a process that involves a change in the chemical composition of the plant.
Additionally, the terms chlorotic (yellowing of leaves due to lack of chlorophyll) and necrotic (dead tissue) refer to conditions that are symptomatic of underlying chemical changes within the plant tissues. Therefore, exposure to poison and the resulting damage is a clear example of a chemical change.
Scientists have found that the carbon-14 content of an unknown prehistoric sample was reduced to one-half. What best describes the identity of the sample?
Answer:
B
Explanation:
A rock that formed more than 10,000 years ago
What organelle Captures energy from the sunlight and uses it to produce food in plant cells?
During photosynthesis, chloroplasts capture energy from the sunlight and use it to produce food in plant cells.
What is photosynthesis?It is defined as a process by which plants and other photosynthetic organisms convert the light energy in to chemical energy through the process of cellular respiration.
Some of the energy which is converted is stored in molecules of carbohydrates like sugar and starches which are made up of from carbon dioxide and water . Photosynthetic organisms which can perform photosynthesis are algae and cyanobacteria. Photosynthesis is largely responsible for producing and maintaining the content of oxygen in earth's atmosphere.
The process begins with proteins absorbing light energy which are called reaction centers and contain a green pigment which is called chlorophyll . In plants ,these pigments are present inside organelles called chloroplasts while in bacteria they are present in plasma membrane.
Learn more about photosynthesis,here:
https://brainly.com/question/26494694
#SPJ2
what is a characteristic of cancer cells
why do cells have a plasma membrane?
A) to separate protiens from the nucleus
B) to distinguish plants from animals
C) to define the size of the cell
D) to separate the inside of the cell from its environment
plzz help well make brainlest plz answer in less than 10 minutes!!!!
In 2002, Colorado was suffering from extreme drought. Which technology will help Colorado reduce the effects of future droughts?
Don't click:
build storm cellars
buy more rain gauges
install hurricane ties
Absolutely click:
build dams
Very very likely click:
use water conservation devices
Explanation:
This question requires you to select all correct answers.
Many people said its
-buy more rain gauges ← I clicked this one and got it wrong
-build dams ← I clicked this one and got it right
-use water conservation devices ← I did not click this one but I believe it is the only one that is left that could be right since its a multiple answer question
So i suggest you to best click build dams and use water conservation devices
Why do biologists assign each organisms a universally accepted name?
Scientific names are more useful because they refer to the same, identical organism regardless of place.
What organisms are a universally accepted name?In theory, every recognized species on Earth have a two-part scientific name. This system is known as “binomial nomenclature”.
These names are important because they make it possible for people all around the world to communicate clearly about different animal species.
Scientists give each organism a name that is well known because the use of common names can be confusing (also known as a scientific name).
Common names differ throughout languages and even between areas of the same country. Additionally, various species could use the same common name.
Therefore, So every organism is individually classified without the worry of mixing up two organisms like a fly and Nat.
Learn more about organisms here:
https://brainly.com/question/1603879
#SPJ2
Which of the following best describes the climates of Europe and North America during the 1.8 million years of the Quaternary period?
A. Hot and Dry
B. Cool and Rainy periods followed by droughts
C. Warm and Mild
D.A series of ice ages followed by periods when the glaciers melted.
Use the term grain and sediment in a sentence
Answer:
Different grain sizes of sediments are important to form different types of rocks. Geologist have great interest in studying sediments and their grain size.
Cholesterol is in which type of macromolecule?
Cholesterol is a macromolecule that is classified as a lipid. Besides steroids, such as cholesterol, lipids include fats, oils, waxes and phospholipids. Lipids are composed of carbon, hydrogen and oxygen.
Cholesterol, a type of lipid, is a macromolecule that plays essential roles in the body, including forming a component of cell membranes, serving as a precursor for important biological compounds, and assisting in fat emulsification for absorption.
Explanation:Cholesterol is a type of macromolecule called a lipid. Lipids are a class of macromolecules that are nonpolar and hydrophobic in nature, which include fats and oils, waxes, phospholipids, and steroids. Cholesterol, as a kind of steroid, is a key component of the plasma membranes of animal cells which helps maintain the membrane's fluid nature.
While there is a common negative perception of cholesterol, it is essential for the proper functioning of the body. It is synthesized mainly in the liver and serves as the precursor to many essential compounds such as steroid hormones like testosterone, Vitamin D and bile salts, which assist in the emulsification of fats and their subsequent absorption by cells.
Learn more about Cholesterol here:https://brainly.com/question/31862527
#SPJ6
A population of shrimp suddenly starts collapsing. a biologist believes that toxins in the food chain are interfering with larvae development. a climate scientist believes that a change in water temperature is depleting food sources from the water. why are both of these options valid scientific hypotheses?
A population of shrimp suddenly starts collapsing. a biologist believes that toxins in the food chain are interfering with larvae development. Both of these options valid scientific hypotheses,
Explain why are both of these options valid scientific hypotheses?
Toxins would kill off prey or even predator, making populations drop. A change in temperature also explains a population drop as the current known species of the area wouldn't be able to cope with the sudden change.
Thus, food chain are interfering with larvae development. Both of these options valid scientific hypotheses,
To learn more about food chain click here:
https://brainly.com/question/16065961
#SPJ2
Using this map and your knowledge of geography, which country listed has the LOWEST population density?
A) India
B) Japan
C) China
D) South Korea
Which of the following is critical in developing a science question?
Developing a science question requires prioritizing testability and reliance on observable phenomena, ensuring meaningful contributions to scientific inquiry and knowledge generation. The correct answer is C. Ensuring it is testable and based on observable phenomena.
In developing a science question, the critical aspect lies in its ability to contribute to scientific inquiry and understanding. It should not merely conform to popular trends or aim for complexity to impress.
Instead, the question should prioritize testability and reliance on observable phenomena.
Firstly, a scientifically rigorous question must be testable. This means that it should be possible to design experiments or gather data that can provide evidence to support or refute hypotheses related to the question.
Testability ensures that the question leads to empirical investigation, which is fundamental to the scientific method.
Without the ability to test a question, it remains speculative and cannot contribute meaningfully to scientific knowledge.
Moreover, a science question should be based on observable phenomena.
This means that it should be grounded in real-world observations or measurable phenomena that can be studied systematically. By focusing on observable phenomena, scientists can gather empirical evidence to support their hypotheses and conclusions.
Observable phenomena provide the basis for constructing scientific models and theories that accurately describe and predict natural phenomena.
Contrary to the options presented, aligning with current popular trends or emphasizing complexity and technical jargon may detract from the scientific validity of a question.
Popular trends may be fleeting and not necessarily grounded in scientific inquiry, while complexity for the sake of impressiveness may obscure the clarity and coherence of the question.
Additionally, inundating a question with technical terms can alienate audiences and obscure the underlying concepts.
In summary, the critical aspect in developing a science question is ensuring it is testable and based on observable phenomena. This ensures that the question contributes meaningfully to scientific inquiry and facilitates the generation of reliable knowledge.
The correct answer is C. Ensuring it is testable and based on observable phenomena.
Complete Question
Which of the following is critical in developing a science question?
a) Ensuring it aligns with current popular trends
b) Making sure it is overly complex to impress others
c) Ensuring it is testable and based on observable phenomena
d) Including as many technical terms as possible for sophistication
Which is NOT involved in photosynthesis or Respiration?
a. Water
b. Carbon dioxide
c. Chlorophyll
d. Cytokinins
what does dew point mean
Final answer:
The dew point is the temperature at which air reaches 100% relative humidity and water vapor condenses into liquid water. To find the dew point, we can use the relative humidity and the temperature. For example, if the temperature is 20.0°C and the relative humidity is 39.0%, we can find the dew point using these values.
Explanation:
The dew point is the temperature at which air reaches 100% relative humidity. It is the point at which water vapor in the air begins to condense into liquid water. For example, if the temperature is 20.0°C and the relative humidity is 39.0%, we can find the dew point by multiplying the relative humidity by the saturation vapor density and converting it to a temperature.