AP BIOLOGY

EVOLUTION

DARWIN’S THEORY OF NATURAL SELECTION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Trees need water to survive. Trees with larger roots are better at sucking up ground water than trees with smaller roots. What would happen to the trees smaller roots if there was a droubt?
A
The large root trees would take majority of the ground water.
B
The small root trees would take majority of the ground water.
C
Nothing would happen.
Explanation: 

Detailed explanation-1: -Explanation: Roots absorb water and minerals from the soil continuously. Evaporation of water from leaves creates a suction force which causes the water to move upwards.

Detailed explanation-2: -Capillary action is a minor component of the push. Root pressure supplies most of the force pushing water at least a small way up the tree. Root pressure is created by water moving from its reservoir in the soil into the root tissue by osmosis (diffusion along a concentration gradient).

Detailed explanation-3: -Water mostly enters a tree through the roots by osmosis and any dissolved mineral nutrients will travel with it upward through the inner bark’s xylem (using capillary action) and into the leaves. These traveling nutrients then feed the tree through the process of leaf photosynthesis.

Detailed explanation-4: -Plants and trees couldn’t thrive without capillary action. Capillary action helps bring water up into the roots. With the help of adhesion and cohesion, water can work it’s way all the way up to the branches and leaves.

There is 1 question to complete.