two students are working on building a birdhouse student 1 applies 10 n to a wooden board in order to slide it across the table

Animals are used as models to learn about the human heart and lungs, and they are also utilized to learn about the human brain and nervous system. The brain, on the other hand, is far more sophisticated and nuanced than any other organ. Furthermore, animal cognition research tries to avoid issues such as which animals are smarter than others, instead concentrating on more particular concerns such as the ones listed above. Scientists frequently state that they are more interested in how well an animal has evolved to flourish in its environment than in its intelligence.

Answer:

When a spike protein changes its shape, it folds on itself and merges its membrane within our cell's membrane to allow itself a way in, causing an infection and the penetration of host cells.

When a spike protein changes shape, it can affect the way a virus interacts with its host cell.

The spike protein is a key component on the surface of some viruses, such as coronaviruses, and is responsible for binding to host cell receptors, allowing the virus to enter the cell and cause infection.

If the spike protein changes shape, the following can happen:
Altered binding affinity: The ability of the spike protein to bind to host cell receptors may be enhanced or diminished. This can potentially affect the transmissibility or infectiousness of the virus.
Immune system evasion: A change in the spike protein shape might make it harder for the host's immune system to recognize the virus, potentially allowing the virus to evade detection and neutralization by antibodies.
Impact on vaccines: Changes in the spike protein shape could also impact the effectiveness of vaccines designed to target the original spike protein, as the altered shape may not be recognized as effectively by the immune system.

Overall, when a spike protein changes shape, it can have various consequences for viral transmission, immune system response, and vaccine effectiveness.

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As the semimajor axis of a planet increase, the orbital period will decrease and the speed of the planet will decrease.

Kepler's second law of planetary motion describes the speed of a planet traveling in an elliptical orbit around the Sun.

This law exaplains the speed of planets around the sun, the speed of the planet increases as it nears the sun and decreases as it recedes from the sun.

From the findings, the astronomical unit of the Mercury is 0.387 and the orbital period is 0.24 year.

[tex]T \propto a^{3/2}[/tex]

[tex]T = ka^{3/2}\\\\k = \frac{T}{a^{3/2}}[/tex]

From the equation above, as the semimajor axis of a planet increase, the orbital period will decrease and the speed of the planet will decrease.

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An example of negative feedback is ; ( D ) water moving into the roots of plants and out of leaves leading to more water moving into the roots.

A negative feedback is the reverse effect of the output of a stimulus. Feedback is the effect of the output of a system on the stimulus from the origin. Water moving into the roots of plants and out of leaves leading to more water moving into the roots is a negative feedback.because if the water flows into the roots and out of the leaves is suppose to lead to water moving out of the roots.

Hence we can conclude that An example of negative feedback is water moving into the roots of plants and out of leaves leading to more water moving into the roots.

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Answer:

I guess this is the correct answer

Explanation:

Mechanical waves do not transfer energy, but electromagnetic waves do. B. Mechanical waves cannot be longitudinal, but electromagnetic waves ..

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Answer:

Extrinsic

Explanation:

Motivation that is physical and can be touched like a trophy or a medal is:  Extrinsic motivation

We have that what is true of auxins is that it stimulates the elongation of cells, hence, controls leaf budding concentration.

Option A is correct

Generally, a plant hormone that stimulates the elongation of cells in shoots and has a role in plant growth regulation.

In conclusion, The are is a feature found in plants.

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Answer:

Sound bounces off objects around you an travel close to your body. When sound reaches you the dome shape of your ears let's the sound travel down the ear canal and to your eardrum. When the sound reaches the brain I assume it processes and you assume a sound to what is making the sound. Like fire alarms for example, when we here that specific sound we know to react by evactuating.

Explanation:

I hope this helps, I used my general knowledge to answer.

Answer:

C. Yes, the results of his experiment were probably inaccurate the

first time.

Answer: To clear out forests.

Explanation: Deforestation is the act of clearing out forests, usually used for making room for buildings of any kind or man-made structures. It's an epidemic in the United States, and we have to take more care about this issue.

Answer:

A

the answer is A!!! good luck <3

Answer:

A. Bones, joints, and connective tissue

Explanation:

The skeletal system supports and protects the body while giving it shape and form. It is composed of bone, joints, ligaments, connective tissue, and cartilage.

Organs are not included, for they are not skeletal. Fascla is a sheet of connective tissue beneath the skin that attaches to, stabilizes, encloses, and separates muscles and other internal organs. It is not part of the skeletal system.

A systemic circuit is the path of circulation between the heart and the rest of the body. It too, is not skeletal.

Hence, the answer is A.

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When a unicellular organism swims from a hypertonic to an isotonic environment, its contractile vacuole becomes less active.

A hypertonic solution is one in which the concentration is greater than the surrounding environment.

An Isotonic solution is one in which the concentration is equal to that of the surrounding environment.

When a unicellular organism swims from a hypertonic to an isotonic environment, its contractile vacuole becomes less active since the solution are the same.

Therefore, the contractile vacuole will more active.

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Aluminum is found is igneous rock

Place the metric ruler across the zone of inhibition, at the widest diameter, and measure from one edge of the zone to the other edge. HOLDING THE PLATE UP TO THE LIGHT MIGHT HELP.

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Answer:

2/4 = 50%......is correct answer.........

Answer:

A. What is the principle of uniformitarianism?

Uniformitarianism would therefore be a theory of the Earth characterized by the uniformity of physical laws, processes and the rhythm with which they have acted in nature (gradualism).

B. How does this principle make it easier for geologists to understand Earth's past?

In geology, uniformitarianism has included the gradualist concept that "the present is the key to the past" and that geological events occur at the same rate as they always have, although many modern geologists no longer hold to strict gradualism.

Explanation:

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The answer is: I and III

Explanation:

The stem transports food and the stem transports water to the leaves of the own plant.

Answer:

Explane:14.02 MC) A and B (or) I and III

Choose all of the statements which describe the difference between the function of the support structures in plants and animals:

A-The stem transports food from the leaves throughout the plant.

B-The exoskeleton is a hard covering that protects some animals.

C-The stem transports water to the leaves of the plant.

Group of answer choices

(A)I and II

(B)I and III

(C)II and III

(D)I, II, and III

Answer: I would say A They have unique perspectives and skills.

An ever-growing demand for resources by a growing population is putting tremendous pressures on our planet's biodiversity and is threatening our future security, health and well-being, reveals the 2012 edition of WWF's Living Planet Report – the leading biennial survey of the Earth's health.

Answer:

condensation

Explanation:

Answer:

Hypothesis: The increased period of exposure to the infected or sick individual (or pathogen carried by the sick individual) increases the number of individuals getting the infection and falling sick.

Null hypothesis: The increased period of exposure to the infected or sick individual (or pathogen carried by the sick individual) does not increase the number of individuals getting the infection and falling sick.

Explanation:

:) rate if it helps!

Answer:

A

Explanation:

It's because there tend to be mire carbon monoxide which is one of the contribution to global warming

Answer:

Global Warming

Explanation:

The greenhouse effect refers to when gases such as water vapor and carbon dioxide remain in the atmosphere they absord heat from the sun. Therefore, it is responsible for global warming which is the addition of more heat to our planet

Answer:

= Euglena are unicellular organisms classified into the Kingdom Protista, and the Phylum Euglenophyta.

= Euglena belongs to Kingdom Protista and the Phylum Euglenophyta.

= Chloroplasts carries out photosynthesis.

= The flagellum is located on the anterior (front) end, and rotates in such a way as to pull the cell through the water.

= Autotrophs are known as producers because they are able to make their own food from raw materials and energy.

= Heterotrophs are known as consumers because they consume producers or other consumers.

= Euglena have an eyespot at the anterior end that detects light, it can be seen near the reservoir. This helps the euglena find bright areas to gather sunlight to make their food.

= The function of the nucleus is it contains the cell's DNA and controls the cell's activities. The nucleolus can be seen within the nucleus.

= The function of the contractile vacuole is that, it helps the cell remove excess water. If the cell did not have this organelle, the euglena could take in some much water due to osmosis that the cell would explode.

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= the amoeba has an unusual way of creeping along by stretching its cytoplasm into fingerlike extensions called pseudopodia. "pseudopodia" means "false foot".

= Nucleus contains the amoeba's DNA.

= In order to reproduce the ameba goes through mitotic division, where the nucleus duplicates its genetic material and the cytoplasm splits into two new daughter cells, each identical to the original parent. This method of reproduction is called binary fission.

= During unfavorable conditions, the ameba can create a cyst, this hard walled body can exist for a long period of time until conditions become favorable again.

= The Fingerlike extensions of the ameba's cytoplasm are called .l Pseudopodia.

= A common disease caused by the ameba is called Amebic Dysentery.

= The amoeba belongs to the Kingdom Protista.

= Protists are classified into plant-like while others are considered animal-like.

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1. What is the funnel like depression on the pellicle called?

=