Answer:
c)atom
Hope this answer correct :)
The fundamental unit of all matter is the atom, consisting of protons, neutrons, and electrons. Cells are the smallest units of life but not the fundamental unit of all matter. Electrons are fundamental subatomic particles known as leptons.
The fundamental unit of all matter, both living and nonliving, is the atom. Atoms are the basic building blocks of matter and consist of three main components: protons (positively charged), neutrons (neutral charge), and electrons (negatively charged). While cells are the basic building blocks of life, it is atoms that make up cells and everything else in the universe. Protons and neutrons form the atom's nucleus, which has a positive charge because of the protons. The electrons move around this nucleus in the electron cloud, attracted by the positive charge.
It's important to note that while cells are indeed the smallest independently functioning biological units in an organism, they are not the fundamental unit of all matter. Additionally, the electron is an example of a fundamental subatomic particle, specifically a lepton, which is different from the composite particles like neutrons that contain quarks.
If a rifleman's gunsight is adjusted correctly but he has shaky arms, he might shoot bullets scattered widely around the bull's-eye target. draw a sketch of the target with the bullet holes. does this show variation (lack of precision) or bias
It shows lack of precision due to a physical obstacle like shaky arms.
Answer:
Lack of precision
Explanation:
Precision is a term used to describe a situation that is close to a correct measurement, but does not correctly measure that measurement. In addition, for a situation to be precise, it is necessary that this situation be repeated and that every repetition shows the same result.
If a situation is repeated and shows different results, it means that this situation is lacking in precision. An example of this can be seen in the question above where a sniper shoots towards a target, does not hit the target and his shots hit places with different distances. You can see a representation of this in the figure below.
According to the nebular hypothesis, when did nuclear fusion begin?
After the planets formed.
When the sun was 5 billion years old.
When the nebula first exploded outward into space.
When particles were pulled together so tightly they combined.
When particles were pulled together so tightly they combined.
Explanation;The solar nebular hypothesis describes the formation of our solar system from a nebula cloud made from a collection of dust and gas.It is believed that the sun, planets, moons, and asteroids were formed around the same time around 4.5 billion years ago from a nebula.According to this theory, the Sun and all the planets of our Solar System began as a giant cloud of molecular gas and dust.Answer:
The correct answer is "When particles were pulled together so tightly they combined".
Explanation:
The nebular hypothesis is the most accepted hypothesis about how the Solar System was created. According to this hypothesis a nebula collapsed and created the particles that later formed the Solar System. First the gravitation force put the particles close to each other. Later, nuclear fusion began when particles were pulled together so tightly they combined and sufficient temperature and pressure was achieved.
Which of the following does NOT describe a basic regulator of digestive control?-Short reflexes act locally in the GI tract.-pH, stretch, and osmolarity are some of the inputs that can initiate digestive responses.-conscious neural control-Digestive effectors are smooth muscle and glands.
Answer:
conscious neural control
Explanation:
Neural control of digestive tract is unconscious achieved via the autonomic nervous system.
Local nervous system of the digestive system is called the enteric or intrinsic nervous system. The major components of this nervous system are two networks or plexuses of neurons:
• The myenteric plexus – controls digestive tract motility
• The submucous plexus - regulates gastrointestinal blood flow and controls epithelial cell function.
As the distance between a satellite in a circular orbit and the central object increases the period of the satellite
The period is the time it takes the satellite to make a complete orbit around the central object. As the distance increases, so does the period because the orbit becomes longer because the radius increases.
Hope this helps!!
Explanation:
Kepler has given its three laws. The third law of Kepler gives the relationship between the orbital period and the distance between the satellite and the center of orbit. Mathematically, it is given by :
[tex]T^2\propto a^3[/tex]
or
[tex]\dfrac{T^2}{a^3}=constant[/tex]
It is clear from above formula, that as the distance between a satellite in a circular orbit and the central object increases, the period of the satellite also increases.
Which characteristic is shared by both cnidarians and flatworms?
A) dorsoventrally flattened bodies
B) flame cells
C) radial symmetry
D) a digestive system with a single opening
E) both A and D
Answer: The answer is D: a digestive system with a single opening.
Cnidarians and flatworms have a digestive system with a single opening.
Explanation: Cnidarians are species of aquatic animals. They are mostly marine organisms that live in both marine and freshwater where they get food. Their respiration and digestion takes place through one orifice and a body cavity.
Flatworms are simple soft-bodied invertebrate animals. Their bodies are not divided into segments. Flatworms depend on a large surface in order to allow oxygen and nutrition to diffuse into their bodies. They have a digestive system with a single opening. Their habitation are in marine, freshwater, and damp terrestrial environments.
Flatworms and cnidarians both have a digestive system with a single opening, hence option D is correct.
Aquatic animal species include cnidarians. They are mostly marine species that feed on both freshwater and saltwater. Through one orifice and a bodily cavity, they breathe and digest food.
Simple soft-bodied invertebrates with flat bodies are flatworms. There are no separate parts to their bodies. For oxygen and food to permeate into the bodies of flatworms, a sizable surface is necessary.
They have a single entrance in their digestive system. They live in areas with saltwater, freshwater, and moist land.
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A parasitic way of life can be best demonstrated by the feeding adaptations of the A) earthworm. B) leech. C) shark. D) spider.
B) Leech. Parasitism is when one organism benefits off another while that organism is harmed. Another example of parasitism is a flea on a dog or cat.
Answer:
B) leech
Explanation:
The feeding adaptations of leech best represents parasitic way of life. Leeches are invertebrate animals and the phylum to which they belong is Annelida and their subclass is Hirudinea. Leeches have an anticoagulant named as heparin which they inject in the body of the host on which they feed upon. Heparin does not let the blood of the host coagulate and in this way they keep sucking the blood of host organism. Leeches are parasitic because they get benefited out of the host without benefiting the host by any means.
List the five classes artropod with two examples of each and then explain if they can be eaten or not.
The five major classes of the artropods are:
- Insects;
Ex: ants; locusts;
Can be eaten. They contain lot of protein, and are easy to digest, especially if cooked.
- Crustaceans;
Ex: crabs; shrimps.
Can be eaten. They are a very popular dish around the world. the human body digests them without any problem, and they are very healthy.
- Centipedes;
Ex: scolopendra; stone centipedes;
Can not be eaten. They contain strong toxins and chemicals that the human body can not process.
- Millipedes;
Ex: julida; polydesmida;
Can not be eaten. As the centipedes, they too contain toxins and chemicals that are not good for the human body.
- Arachnids;
Ex: tarantula; wold spider;
Can be eaten. When cooked, they are easy to digest, and in general the human digestive system doesn't have problems with them.
Which of these accurately describes Newton’s third law?
A. The relationship among mass, acceleration and net force.
B. The stronger the net force acting upon an object, the greater the acceleration of the object.
C. An object in motion stays in motion, and an object at rest stays at rest, unless an unbalanced force acts upon it.
D. For every action force, there is an equal and opposite reaction force.
The answer is d I hope this helps
Newton's third law is accurately described by 'For every action force, there is an equal and opposite reaction force,' illustrating the mutual interaction between two objects where forces are applied.
The correct answer that accurately describes Newton's third law is D: For every action force, there is an equal and opposite reaction force. This law highlights the interaction between two objects: when one object exerts a force on a second object, the second object simultaneously exerts a force back on the first object of equal magnitude but in the opposite direction.
Newton's third law can be observed in various everyday scenarios, such as when you push against a wall, the wall pushes back against you with the same force. This law is an essential principle in understanding the nature of forces and how they interact to produce motion or maintain the status quo.
Definition: This is a type of reproduction where there is a exchange of genetic information in order to create new individuals.
The answer is sexual. hope it helps
Using what you learned about ecological interactions think of an example of each interaction in which humans are involved
a. Competition: Humans compete with all organisms for space.
b. Parasitism: Humans have many parasites: head lice, ticks, tapeworms, etc.
c. Mutualism: We have mutualistic relationships with all domesticated plants/animals.
d. Commensalism: Pigeons thrive in metropolitan ecosystems without really
affecting humans (except for being mildly disgusting).
Humans partake in various ecological interactions such as predation when hunting, competition for resources like land, mutualism through agriculture, and parasitism under sickness.
Explanation:In regard to ecological interactions, humans are intricately involved in different ways. For example, in predation, humans serve as predators when they hunt animals and fish for food. This is an interaction where one organism (the predator) kills and eats another (the prey).
Regarding competition, humans compete with other species for resources such as land, which many other species are also reliant on for their habitats. In the context of mutualism, humans cultivate plants and gain food in return, such as in the case of fruit trees where humans take care of the trees, and in return, these trees provide fruits that humans consume.
For parasitism, an example can be seen in the relationship between humans and various harmful viruses and bacteria, as these microbes use human bodies to breed and nourish themselves, often causing illness in their human hosts.
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If someone add thousands of small fish to a lake, how would the number of big fish change
Answer:
The population of big fish would increase.
Explanation:
As small fish increase, more food for bigger fish will increase, so bigger fish will naturally navigate to the lake.
The phylum __________ has both invertebrate and vertebrate groups.A. EchinodermataB. UrochordataC. ChordataD. CephalochordataE. Onychophoran
Your answer would be C. Chordata.
The phylum Chordata includes both invertebrate and vertebrate groups. The correct answer is C.
Chordates are characterized by the presence of a notochord, a hollow nerve cord, pharyngeal slits, and a post A tail at some stage of their development.
Invertebrate chordates, such as tunicates and lancelets, belong to the subphyla within Chordata. These invertebrate groups possess some of the characteristic features of chordates but may not retain them throughout their entire life cycle.The vertebrates, including fish, amphibians, reptiles, birds, and mammals, also belong to the phylum Chordata. They possess a backbone or vertebral column, which distinguishes them from the invertebrate chordates.Therefore, the correct option is C.
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Why do insectivorous plants trap insect while they also prepare carbohydrate by photosynthesis
But carnivorous plants often live in "awful", nutrient-poor places. In other words, very nutrient scarce environments where they're very boggy, so most of the nutrients have probably been leached away by water. As a result, the soil is so poor that many of those trace elements that keep plants growing normally, just aren't available in appreciable amounts. So the plants need to look to the air to obtain that nutrition and they do it by catching insects because if they catch an insect, insects have got lots of iron, they've got lots of proteins, they've got lots of other micronutrients in them that the plants have adapted and evolved to make use of, and to supplement the poor source of things that are coming in through the soil.
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4. The medium ground finch and the cactus finch are adapted to consume different types of foods. Can you think of a situation in which the medium ground finches would have a survival advantage over the cactus finches? A disadvantage?
Answer:
Long beaks of medium ground finches allows them to opt for alternate sources of food in times of extremities while this is not the case with the cactus finches.
Explanation:
The medium ground finches have larger beaks and thus apart from small seeds they can also break open the large seed. In case if the small seeds get scarce, a medium ground finch can still survive by taking advantage of feeding on alternate source of food but small beaked birds such as cactus finches shall die out of starvation.
This adaptation of medium ground finches gives it a survival advantage over the cactus finches
Answer:
Large beak size of medium ground finch assists in aiding advantage to survival and reproduction as compared to cactus finch.
Explanation:
The medium ground finch will take the advantage of its peak size and structure over the cactus finch for both its survival and reproduction.
Unlike the cactus finch, the medium finch have large beaks due to which they take advantage of alternate food sources such as large seeds, hard seeds etc.
Beak size also plays an essential role in attracting males with large beak size and hence medium ground finch reproduce easily and frequently as compared to cactus finch
During the gastrula stage of embryo development, the cuplike opening becomes the mouth in _[blank]_.
placental mammals
chordates
deuterostomes
protostomes
Final answer:
During the gastrula stage of embryo development, the opening called the blastopore becomes the mouth in protostomes.
Explanation:
During the gastrula stage of embryo development, the cuplike opening, known as the blastopore, differentiates into either the mouth or anus, depending on the type of organism. In protostomes, this opening develops into the mouth, with the second opening becoming the anus. On the contrary, in deuterostomes, the blastopore becomes the anus, and the mouth develops at the opposite end of the gut. Given these patterns of development, the correct answer to the question, "During the gastrula stage of embryo development, the cuplike opening becomes the mouth in _[blank]_." is protostomes.
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Beginning with carbon fixation, arrange the steps of the Calvin cycle in the correct order.
Answer:
1-Carbon dioxide reacts with five carbon compound.
2-Formation of an unstable 6-carbon compound.
3-Formation of a stable 3-carbon compound.
4-Use of ATP to from a high energy 3-carbon compound.
5-Formation of glucose, which leaves the chloroplast.
6-Use of enzyme and ATP to from 5-carbon compound.
Explanation:
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the part of your brain that is responsible for answering this question is the?
The neocortex, responsible for higher-order cognition, is the part of the brain that enables you to answer questions. It handles complex behavior, language, and spatial reasoning.
The part of the brain responsible for answering this question is the neocortex. The neocortex is the newest part of the brain in evolutionary terms and is responsible for higher-order cognition, such as thinking, understanding, and decision-making. It encompasses the functions of complex behavior, language, and spatial reasoning, all of which are essential for processing and formulating an answer to a question.How do cells maintain water balance through osmosis?
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How do enzymes influence the amount of activation energy needed?
What your cells have to help overcome a problem of high activation energy are called enzymes. Enzymes are proteins that lower the activation energy of a reaction. In doing this, enzymes increase the rate of a reaction, helping it to occur faster. However, enzymes are not consumed in a reaction; they simply help it to occur.
Enzymes make things easier for your cells to work properly and help chemical reactions occur. There are hundreds of different kinds of enzymes in your cells, which all participate in different types of reactions. Enzymes can break molecules apart, build or add molecules, and even rearrange them.
In lowering the activation energy of a reaction, enzymes decrease the barrier to starting a reaction. It's important to note, however, that the change in energy remains the same between the start and end of a chemical reaction.
Enzymes are catalysts, they decrease activation energy to speed up reactions
The dermis is the _[blank]_ of the skin.
thinner outer layer
thicker outer layer
thinner inner layer
thicker inner layer
Thinner outer layer
Answer:
thicker inner layer
Explanation:
The dermis is the thickest layer of the skin that is found below the epidermis and above the hypodermis and it gives strength to the skin. Also, it provides protection against trauma. According to this, the answer is that the dermis is the thicker inner layer of the skin.
Movement of the chromosomes during anaphase would be most affected by a drug that prevents which of the following events in mitosis and cell division?
A) nuclear envelope breakdownB) elongation of microtubulesC) shortening of microtubulesD) formation of a cleavage furrow
The correct answer is: C) shortening of microtubules
Chromosome movement is possible thanks to changes in microtubule length. Several types of microtubules are involved. First, during the anaphase kinetochore microtubules shorten and consequently the chromosomes move toward the spindle poles. Then the astral microtubules that are anchored to the cell membrane pull the poles further apart. At the end of anaphase, the interpolar microtubules slide past each other and that additionaly separate the chromosomes.
In mitosis and cell division, the movement of chromosomes during anaphase would mainly be affected by a drug that prevents the shortening of microtubules as they are responsible for the movement of chromosomes to the cell poles.
Explanation:The movement of chromosomes during anaphase during mitosis and cell division would be most affected by a drug that prevents the shortening of microtubules (option C).
During anaphase, sister chromatids separate and move towards the opposite poles of the cell. This process is facilitated by the shortening of microtubules which are attached to the kinetochores of the sister chromatids, pulling them apart.
If a drug prevented this shortening, the chromosomes would have difficulty separating and moving to the cell poles during anaphase.
The movement of chromosomes during anaphase in mitosis is primarily facilitated by the shortening of microtubules. During anaphase, the microtubules attached to the kinetochores of the chromosomes pull them towards opposite poles of the cell. If a drug prevents the shortening of microtubules, it would impair the movement of chromosomes and lead to abnormal cell division.
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Moon altitude of Archimedes
Microscopic thin-walled tubes carrying blood are called
A : Arterioles
B : Capillaries
C : Arteries
the answer is B. please let me know weather its right or wrong
Capillaries are the microscopic thin-walled tubes that carry blood.
Explanation:The correct answer is B: Capillaries. Capillaries are microscopic thin-walled tubes that carry blood between arterioles and venules. They are the smallest blood vessels in the body and play a vital role in the exchange of oxygen, carbon dioxide, nutrients, and waste products between the blood and surrounding tissues.
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why type of physical weathering is caused by the expansion of water?
Final answer:
Frost wedging, also known as freeze-thaw weathering, is the type of physical weathering caused when water freezes in the cracks of rocks, expanding and breaking the rock apart.
Explanation:
The type of physical weathering caused by the expansion of water is called frost wedging or freeze-thaw weathering. This occurs when water permeates cracks in rock or soil and then freezes, expanding and exerting a force that can fragment the rock. In the broader context of thermal stress, many materials, including water, expand when heated and contract when cooled. Water is unique in that it expands upon freezing, which is essential to the process of freeze-thaw weathering.
Examples of thermal stress impacts include roadways buckling due to a lack of sufficient expansion joints, and biological cells rupturing when foods are frozen. Conversely, large forces can result if materials that tend to expand on heating are restrained, potentially causing them to deform or break their container.
A device used to clean exhaust gasses before they exit the cars tailpipe is called?
The catalytic converter
Catalytic converters, preheated to maximize their efficiency, are the devices used to clean exhaust gases in cars by converting carbon compounds to carbon dioxide and reducing nitrogen oxides.
Explanation:The device used to clean exhaust gases before they exit the car's tailpipe is called a catalytic converter. Catalytic converters are used in automobiles to reduce the amount of toxic emissions produced by burning gasoline in internal combustion engines.
They work by utilizing a carefully selected blend of catalytically active metals to effect complete combustion of all carbon-containing compounds to carbon dioxide while also reducing the output of nitrogen oxides. This is achieved through two processes, one that involves adding more oxygen to the molecule and the other that removes it.
To maximize efficiency, most catalytic converters are preheated by an electric heater even before the automobile exhaust is hot enough, ensuring that the metals in the catalyst are fully active and able to perform the necessary reactions.
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Any stimulus that opens a ________ ion channel will produce a graded potential.
A) a voltage-gated
B) a chemically-gated
C) a sodium
D) a mechanically-gated
E) All of the answers are correct.
E) All of the answers are correct.
Ion channels are proteins located in the membrane that allow ions to pass through the channel pore. Ion channels can be classified (by what opens and closes the channels) into few groups:
• Voltage-gated channels-open and close in response to membrane potential
Examples: Voltage-gated proton channels, Voltage-gated sodium channels, Voltage-gated potassium channels
• Ligand-gated (neurotransmitter) or ionotropic receptors (ligand binds to extracellular domain of the receptor
Examples: "nicotinic" Acetylcholine receptor, ionotropic glutamate-gated receptors
• Lipid-gated- lipid molecules bind to the transmembrane domain of the channel
Example: Inward-rectifier potassium channels
• Light-gated channels-like rhodopsin channel that is directly opened by photons
• Mechanosensitive (e.g. stretch, pressure) ion channels.
Which of the following correctly identifies body structures made of a collection of tissues?
organs
organ systems
super tissues
cells
Tissues make up organs
Answer: organs
Explanation: If we take into consideration the structure of the human body we can say that the cells are the smallest biological units. A combination of cells form tissue. The different organs of the body are made of tissue and a group of organs is an organ system. So, a structure made up by a combination of tissues is an organ.
36. Breezes are named
A- for the feature they flow towards.
B- for the person who first observed them.
C- for the country they flow in.
D- for the feature they flow from.
The correct answer is - D- for the feature they blow from.
The breezes have all sorts of names, most of which tend to be derived from the feature they flow from. Lot of winds are named after the side of the world that they come from, so there's easterlies, westerlies, northern winds, southern winds. Some are maned after a river, as they flow along side it, like Vardarec. Some may be named after a mountain, or just have a name similar to a mountain, like mountain wind, forest wind, gorski vetrec.
Some winds, on the other hand, have names that describe their force, especially that goes for the strong ones, like bura along the Croatian coast on the Adriatic Sea.
Can anyone help me? Make sure that the answer is correct.
i believe its b, dry and sandy
The answer is D.) because it has to be, because if the criniod swept onto shore it has to shallow
Which of the following statements about transmembrane proteins is correct?-They are always inserted with the amino terminus on the lumenal side and the carboxyl terminus in the cytosol.-They are always inserted with the carboxyl terminus on the lumenal side and the amino terminus in the cytosol.-The signal sequences are always cleaved off.-They usually have one or more helical regions spanning the membrane bilayer.-They can cross the membrane only once.
Answer:
They usually have one or more helical regions spanning the membrane bilayer
Explanation:
Transmembrane proteins are type of integral proteins meaning that they are permanently attached to biological membrane. Transmembrane proteins span through the plasma membrane so most of their structure is hydrophobic.
The major role of these proteins is transport role: they act as a channels that undergo conformational change in order to move a substance through the membrane.
Classified by their structure they can be put into two types: alpha helical and beta barrels.