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mariarad [96]
3 years ago
14

What are covalent bonds???

Biology
2 answers:
iris [78.8K]3 years ago
7 0
A covalent bond is a chemical bond which involves the sharing of atoms.
tester [92]3 years ago
4 0
A chemical bond that involves the sharing of electron pairs between atoms.
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Plz help I will give brainliest
AlekseyPX

Answer:

<u><em>Proteins</em></u><em>:</em> used in facilitate transport across membrane

<u><em>Carbohydrates</em></u>: used to drive cellular respiration

<u><em>Lipid</em></u>: composes the cell membrane

<u><em>Nucleic acid</em></u>: used to create identical daughter cells in mitosis

Explanation:

A. In the cell membrane, transport proteins or channels are present which selectively allow the transfer of molecules. This is why the cell membrane is also known as a selectively permeable membrane.

B. In cellular respiration, which takes place in mitochondria, glucose (carbohydrate) is used to generate ATP molecules.

C. The cell membrane is composed of a lipid bilayer that contains protein channels. This makes the membrane insoluble in water and maintains the integrity of the cell.

D. The nucleic acid is the hereditary material that can replicate and transfer genetic information to the next generation.

8 0
3 years ago
Which branch of earth science most likely involves the study of climate change and its effect on people?
Mashcka [7]

Answer:

C. meteorology

Explanation:

meteorology is the scientific study of the atmosphere that focuses on weather processes forecasting, and climate.

3 0
4 years ago
Can someone give me an example of negative and positive feedback?
Archy [21]
A negative feedback example is Human body temperature - The hypothalamus of a human responds to temperature fluctuations and responds accordingly. If the temperature drops, the body shivers to bring up the temperature and if it is too warm, the body will sweat to cool down due to evaporation.

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4 years ago
Do you think another mass extinction is possible? Why or why not? Defend your answer with reasons ​
nevsk [136]

Answer:

Ecologists and paleontologists say that Earth is now experiencing another mass extinction. One-quarter of all mammals are endangered. But unlike some past extinctions this one is not caused by a single chance event such as an asteroid impact.

Explanation:

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What are the options? 
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