Question

What is responsible for most of the uptake of water and nutrients performed by roots?

a. the first vascular tissues formed in the elongation zone

b. the older portions of the root, with the highest density of branching

c. the meristem and root cap at the root tip

d. the first tissues of the zone of cell maturation, which have epidermal root hairs and a developed Casparian strip

Select all that apply:

How would shoot and root growth be affected by a mutation that caused plants to lose the ability to polymerize glucose into starch granules? Select all that apply.
	Lateral branch shoots would grow more upright and be less able to maintain a horizontal orientation. Lateral branch shoots would grow more horizontally and have less of a tendency to turn upward. Lateral branch roots fully embedded in soil would grow randomly upward and downward. Only shoots would be affected. Roots breaking the soil surface would grow upward.

Answer 1

ANS.1. Option D is the correct answer.

Explanations;- Most of the water and the minerals are absorbed by the first tissues of the zone of cell maturation, which have epidermal root hairs and a developed Casparian strip. The zone of maturation has some epidermal hair which are unicellular and used for the absorption of the water. The unicellular root hairs increases the surface area of absorption.

ANS.2. Option B is the correct answer.

Explanation;- Due to the mutation that caused plants to lose the ability to polymerize glucose into starch granules, the Lateral branch shoots would grow more horizontally and have less of a tendency to turn upward.