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neonofarm [45]
3 years ago
8

If the stem of a plant is bent or snapped, why does the part above the bend usually die, even if it is propped up with a support

?
Biology
1 answer:
mezya [45]3 years ago
4 0
Plants have a vascular system (analogous to ours) made of Xylem, cells which bring nutrients from the roots to the leaves, and Phloem, cells that move sugar from the leaves to the rest of the plant. when you bend or snap the stem, these "veins" can be broken, and will no longer transfer nutrients to and from the upper part of the plant, even standing the stem back up will not reconnect these. and, like cutting off circulation to your hand, the part not receiving nutrients will soon shrivel and die.
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What part of the body uses active transport to take up nutrients after concentration has reached equilibrium
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<h3>What is Active transport?</h3>

Active transport may be defined as the process that occurs against the concentration gradient and is mediated by carrier proteins. Metabolic energy is used to move ions or molecules against a concentration gradient.

During the process of digestion, the villi in the small intestine enthrall the soluble nutrients gradually. Over time, the concentration of nutrients in the villi acquires an equilibrium with the concentration in the gut. Until here, the nutrient uptake is carried by the process of passive diffusion.

But after attaining the equilibrium, the nutrient uptake is carried by the process of active transport.

The complete question is as follows:

What part of the body uses active transport to take up nutrients after concentration has reached equilibrium?

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Therefore, the correct option for this question is C, i.e. small intestine.

To learn more about Active transport, refer to the link:

brainly.com/question/18434867

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C. K+ ions flow out the the guard cells and water flows out the cells.

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In order for this the occur the osmotic pressure of the cellular environment must change and this is done by changing the solute concentration.

The pumping in of K+ ions out the cell allows the solute concentration to decrease and this in turn encourages the movement of water across a concentration gradient through a semi-permiable membrane.

The water leaves the guard cells and they become flaccid. This causes the stomata to be covered.

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