The sucrose move in source to sieve by active transport.
<h3>What is active transport?</h3>
Active transport is a type of transport in which the cell expends energy to move solutes against their concentration gradients. The sodium-potassium pump is an example of active transport. Active transport differs from passive transport in that the cell does not expend energy.
In this case, the sucrose moves from companion cells into source to sieve elements by active transport. This reduces the water potential of the source to sieve element by osmosis, which increases the hydrostatic pressure.
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In the southern hemisphere, the tundra includes Antarctica. The arctic tundra in the northern hemisphere includes parts of Russia, Iceland, Canada, Norway, Greenland, and Alaska (state in the US).
Answer:
Las moléculas grandes que se encuentran en los alimentos intactos no pueden atravesar las membranas celulares. Los alimentos deben dividirse en partículas más pequeñas para que los animales puedan aprovechar los nutrientes y las moléculas orgánicas.
Explanation:
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