BIOLOGY MIDDLE SCHOOL

The adjustable opening in the center of the eye that helps control the amount of light entering the eye is called the __________.

Answers

Answer 1
Answer: The adjustable opening in the center of the eye that helps control the amount of light entering the eye is called the Pupil. It is located in the center of the iris. Certain eye muscles (involuntary) control the size of the pupil.

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Protein that detects a signal molecule and performs an action in response is called a​

Answers

Answer: Receptor

Explanation: a protein that detects a signal molecule and performs an action in response.

Final answer:

A receptor protein is a type of protein that detects a signal molecule (ligand) and performs an action in response. It can induce a chemical reaction within the cell or initiate a signaling pathway which can change the cell's behaviour.

Explanation:

A protein that detects a signal molecule and performs an action in response is called a receptor protein. Receptor proteins in or on a target cell bind to specific molecules outside the cell called ligands. When a ligand binds to its specific receptor, it induces a chemical reaction within the cell. This binding could open a channel for certain ions to flow into the cell or initiate a signaling cascade or pathway with the help of second messengers, enzymes, and other proteins. The signaling cascade eventually leads to a change in the cell's environment or behavior. For example, neurotransmitters such as dopamine can act as ligands, binding to dopamine receptor proteins on nerve cells and causing specific responses in these cells.

Learn more about Receptor Proteins here:

brainly.com/question/10298044

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One of two tiny structures located in the cytoplasm of animal cells near the nuclear envelope

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These are known as centrioles, which are microtubule organizing centers

How does fibre help the body ?

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It adds bulk to our stools.

It helps food to move through your digestive tract more quickly for healthy elimination.
Fibre helps prevent diseases, diabetes, heart disease, weight gain and cancers. It also helps with stool
hope that helps:)

Why is water important to living things?

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Living things cannot live without water. Every living thing needs water. The body looses water through waste and we need more water to replace what's been wasted


Water helps living things survive, including people, animals and plants :D

This is why water is important to living things

Hope this helps! :)

What is an undefined nuclear region containing only nucleic acid

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nucleoid is the answer
Cheers!!!

The three processes that transfer energy over Earth's surface

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I processes that transfer energy over Earth's surface are:
1) Conduction
2) Convection
3) Radiation
4) Latent Heat

Conduction is the transfer of heat from a warmer object to a cooler object through molecular interaction. As the Sun heats the ground, energy from the heated ground is transferred to the atmosphere by conduction.

Convection is the transfer of heat by mass movement of a fluid. Convection appears mostly in liquid and gases because they are free to move around. Heat is transferred upward and outward, away from the heat source, while cooler air is brought to replace the rising air.

Radiation is the final process of heat transfer. The energy received from the Sun, radiation, are absorbed by all objects that in turn radiates some of the energy back to its surroundings in a weaker form of energy called long wave radiation such as heat.

Later heat, also known as phase change, is the heat required to change phases. Example of phase change is water transforms from gas to liquid or solid or vice versa. For water to transform from liquid to gas, latent heat from the surrounding atmosphere is needed. In evaporation, water takes heat from the surrounding air in order to evaporated and become gas.


♥ Conduction
♥ Radiation
♥ Convection
♥ Latent Heat
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