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kodGreya [7K]
3 years ago
11

How do the respiratory and circulatory systems work together? *

Biology
1 answer:
hram777 [196]3 years ago
3 0
B) They supply the body’s cells with oxygen
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What is MC1R’s function?
slamgirl [31]

<em><u>The MC1R gene provides instructions for making a protein called the melanocortin 1 receptor. </u></em>

Explanation:

MC1R’s function-This receptor plays an important role in normal pigmentation. The receptor is primarily located on the surface of melanocytes, which are specialized cells that produce a pigment called melanin.

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2 years ago
A dichotomous key may be used to classify butterflies.
kirill115 [55]
Well yes, but a dichotomous key can be used to classify just about anything you want.
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3 years ago
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what is the characteristic of a cell membrane that controls which substances can enter and exit the cell
lorasvet [3.4K]

Answer:

selective permeability

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The property or characteristic of cellular membrane to allow certain substances to pass through the cell is known as selective permeability. The movement of molecules and ions across the cell can be active or passive.

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2 years ago
Each double bond in carbon dioxide represents ________. O=C=O
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Each double bond in carbon dioxide represents two pairs of electrons which are shared between the carbon and oxygen atoms.

<h3>What is an Electron?</h3>

This refers to a subatomic particle which has a negative charge and is involved in chemical reactions.

Each double bond in carbon dioxide represents two pairs of electrons which are shared between the carbon and oxygen atoms so as to enable them achieve an octet configuration.

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1 year ago
Ir teacher D UT
vlabodo [156]

ALL animals make use of other animals and organisms for food. They are heterotrophic so they have to get energy elsewhere.

ALL animals are capable of motion at some stage of their lives.

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