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Alchen [17]
4 years ago
7

Which molecules may diffuse across a cell membrane without the expenditure of energy or the use of membrane proteins?

Biology
1 answer:
wel4 years ago
6 0

Explanation:

In simple diffusion, small molecules without charges such as oxygen and carbon dioxide flow through a plasma membrane without assistance and without expending energy. Other substances such as proteins, glucose and charged particles called ions cannot pass through the selectively permeable membrane

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frozen [14]

Answer:

C.

Explanation:

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2 years ago
A substitute is a good that is​ _____ another​ good, and a complement is a good that is​ _____ another good.
marishachu [46]

The right option is c. consumed in place of; consumed together with

A substitute is a good that is consumed in place of another good, and a complement is a good that is consumed together with another good. Substitutes serve in place of another and complements make something seem better.






8 0
3 years ago
5. How is density affected when? answer all plz be correct
kirza4 [7]

Answer:

A the temperature increases.

Explanation: When the same amount of water is heated or cooled, its density changes. When the water is heated, it expands, increasing in volume.

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3 years ago
Plant transgenic technology is important for the introduction of genes that convey traits related to environmental stresses and
Gekata [30.6K]

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efficient selection strategy

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Explanation:

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But plant tissue culture is not directly involved in the plant transformation. The plant tissue culture is the collection of the techniques which is used to maintain the growth of the plant cells and so it does not plays any important role in plant transformation.

The plant transformation is the introduction of the desired characters into the plant and then the growth of transformed plant takes place in the culture medium. This has no role in the plant transformation or has less role.

8 0
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Oxygen is a product of the electron transport chain.<br> True or False
scoundrel [369]

Answer:

true

hope this helps you ☺️☺️

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