Biology Test Plant Biology

Question 1

What is the primary function of chloroplasts in plant cells?

Accepted Answer

To carry out photosynthesis

Answer

Chloroplasts are the organelles responsible for photosynthesis, converting light energy into chemical energy (glucose) using carbon dioxide and water.

Question 2

Which tissue in plants is responsible for transporting water from roots to leaves?

Accepted Answer

Xylem

Answer

Xylem tissue transports water and dissolved minerals from the roots upward through the plant using a combination of root pressure, capillary action, and transpiration pull.

Question 3

What is the role of stomata in plants?

Accepted Answer

Gas exchange and water vapor release

Answer

Stomata are tiny pores on leaf surfaces that allow carbon dioxide in for photosynthesis and release oxygen and water vapor through transpiration.

Question 4

Which hormone promotes cell elongation and is involved in phototropism?

Accepted Answer

Auxin

Answer

Auxin promotes cell elongation and causes phototropism by accumulating on the shaded side of the plant, making those cells elongate more and causing the plant to bend toward light.

Question 5

What is the function of root hairs?

Accepted Answer

To increase surface area for water and mineral absorption

Answer

Root hairs are extensions of epidermal cells that dramatically increase the surface area of roots, improving the efficiency of water and mineral absorption from the soil.

Biology Practice Test Practice Test

Biology Practice Test Practice Test

Biology Test Plant Biology