Question

question 9
vascular plants rely on a consistent supply of various chemicals to maintain normal cellular functions. which substances are transported between plant tissues by the vascular system? select three correct answers.
select one or more:
□a. hormones produced throughout the plant
□b. carbon dioxide absorbed by dermal tissue
□c. water absorbed by the root system
□d. glucose produced by leaves
□e. oxygen produced by the root system

Explanation:

• Plant vascular systems (xylem and phloem) transport key substances:

1. Hormones are carried by both xylem and phloem to regulate growth across tissues.
2. Water absorbed by roots is transported upward via xylem to aerial tissues.
3. Glucose (photosynthate) made in leaves is moved via phloem to non-photosynthetic tissues.
4. Carbon dioxide enters leaves directly through stomata, not the vascular system.
5. Roots do not produce oxygen; oxygen is made in leaf chloroplasts, and roots take in oxygen from soil.

Answer:

a. Hormones produced throughout the plant
c. Water absorbed by the root system
d. Glucose produced by leaves