Plant Biology Quiz 23 (20 MCQs)

Quiz Instructions

Select an option to see the correct answer instantly.

1. What might a thin tree ring indicate?

Correct Answer: B) A year of drought.

2. A plants directional growth in response to external stimuli is called .....

Correct Answer: A) Tropism.

3. The regions of tissue in a plant that produce cells that later become specialized tissues are the

Correct Answer: D) Meristems.

4. Which of the following conditions is least likely to increase the rate of transpiration in a plant?

Correct Answer: C) An increase in humidity.

5. The movement of O2 and CO2 between the plant and the environment is known as

Correct Answer: A) Gas exchange.

6. The process in which plants make food is called

Correct Answer: C) Photosynthesis.

7. How will lowered humidity affect the rate of transpiration?

Correct Answer: B) Increase it.

8. Roots have ..... gravitropism whereas stems and leaves have ..... gravitropism.

Correct Answer: A) Positive, negative.

9. Which Of The Following Is Parasite?

Correct Answer: C) Cuscuta.

10. Water gets into root hair cells through the process of .....

Correct Answer: C) Osmosis.

11. The phloem of a plant is responsible for:

Correct Answer: D) Carrying sugars to all parts of the plant.

12. What do plants release during photosynthesis that is important for human and animals?

Correct Answer: C) Oxygen.

13. Which of the following would NOT increase transpiration?

Correct Answer: A) High humidity.

14. A ..... is an organism that uses energy from an outside source, such as the sun, to make its own food.

Correct Answer: B) Producer.

15. What causes water to fill the xylem pipeline completely, from the roots to the leaves, and to resist any separation?

Correct Answer: D) Cohesion of water molecules.

16. Gymnosperms hold seeds in male and female:

Correct Answer: D) Cones.

17. The gametophytes of gymnosperms are found inside reproductive structures called

Correct Answer: B) Cones.

18. Which plant characteristic would likely result in the highest rate of transpiration?

Correct Answer: B) Leaves with a large surface area.

19. In cellular respiration glucose is made into

Correct Answer: A) Usable energy ATP.

20. What is the function of the flower part of a plant?

Correct Answer: A) Help the plant reproduce.