Biology Test Practice Test: Video 3 Answers (25 Questions)

Question 1

What is the main function of the waxy cuticle on leaf surfaces?

Accepted Answer

Prevent excessive water loss

Answer

The cuticle is a layer of cutin secreted by epidermal cells that reduces transpiration by limiting water vapor loss from leaf surfaces.

Question 2

What type of root adaptation allows mangrove trees to exchange gases in waterlogged soils?

Accepted Answer

Pneumatophores

Answer

Pneumatophores are specialized vertical roots that extend above the waterline to allow gas exchange in oxygen-poor, flooded soils.

Question 3

What is alternation of generations in plants?

Accepted Answer

A life cycle alternating between haploid and diploid stages

Answer

Alternation of generations is a reproductive cycle where plants alternate between a multicellular haploid stage (gametophyte) and a multicellular diploid stage (sporophyte).

Question 4

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 5

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.

Biology Practice Test

Biology Practice Test

Biology Test Practice Test: Video 3 Answers (25 Questions)