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inysia [295]
3 years ago
13

When does the cell have to use active transport ?

Biology
1 answer:
soldier1979 [14.2K]3 years ago
8 0
The cell has to use active transport when it's trying to transport material against the concentration gradient. (from low to high concentration) Or, if a molecule is too big to diffuse through the cell membrane, it must be moved through using a carrier protein.
Hope that helped you.
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Identify the plant tissues in the three images.<br> A<br> B.<br> C
Bond [772]

I originally asked for the images but I will give it my best shot at answering your question without them! :D

There are only three types of plant tissues:

1. Dermal

2. Ground

3. Vascular

The dermal tissue is the outside of the plant's root, stem, or leaf, A.K.A the  the skin. If you're looking at a circular image, what ever is pointing to the outside ring of the stem is the dermal tissue.

The ground tissue is the flesh of the plant that is inside the dermal tissue. It surrounds the vascular tissue in the middle of the stem. Whatever letter is pointing to the wide, fleshy ring, that is touching the dermal tissue is the ground tissue. It is the largest part of a plants stem, roots, or leaves.

Lastly, the very inner ring or rings of the plant is the vascular tissue. It's made up of xylem and phloem. This can be found in many different places depending on the part of the plant, but what you're looking for is tiny circles within the ground tissue. If you're looking at the roots, you will see one circle in the very center of the plant, surrounded by ground tissue. If you're looking at the leaves, you will see one circle as well, and additionally other tiny circles throughout the ground tissue in each wing. Lastly, if you're looking at the stem, you'll see a circle of tiny circles within the ground tissue. These small circles are all vascular tissue.

7 0
3 years ago
Which of the following is a statement of the first law of thermodynamics?
Maurinko [17]
The answer is Energy cannot be created nor destroyed.
3 0
3 years ago
Which of the following is true of metabolism in its entirety in all organisms? aq. Metabolism depends on a constant supply of en
antoniya [11.8K]

Answer:

Metabolism consists of all the energy transformation reactions in an organism. (Ans. B)

Explanation:

Metabolism is defined as the total sum of the chemical reactions which synthesized in every cell of living things and provides energy for formation of new organic materials and vital processes (such as movement, growth, reproduction and development).

In living metabolism, enzyme mediated chemical reactions takes place. Energy which comes from nutrients and solar energy fueling multistep reactions and converting into the molecules which is necessary for maintenance and growth.

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3 years ago
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astra-53 [7]
In order of importance, the world's four most important crop species are: CORN, WHEAT, RICE AND POTATOES. 
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4 years ago
Answer the questions above​
RSB [31]

Answer:

<em>Hey there!</em>

3) Well injection is usually done through the vein because they need the substance to go into the blood.

4) Some people believe that the heart is on the left side because its the left ventricle and atrium responsible and when people hear left they think the heart is on the left.

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<em>Hope this helps :)</em>

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3 years ago
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