Back to PLANT GROWTH AND DEVELOPMENT
NEET UG BIOLOGY MCQ: PLANT GROWTH AND DEVELOPMENT
1
Medium
1 of 1
Analyzing
+4 | -1
Among the following features of ethylene, how many are antagonistic to abscisic acid?
a) Horizontal growth of seedlings b)Promotes abscission of plant organs
c) Effective in fruit ripening d) Breaking seed and bud dormancy
e) Initiates germination in some seeds
a) Horizontal growth of seedlings b)Promotes abscission of plant organs
c) Effective in fruit ripening d) Breaking seed and bud dormancy
e) Initiates germination in some seeds
View answer and explanation
Correct option: B
2
Option B (2) is correct because ethylene's promotion of seed/bud dormancy breaking and germination initiation are antagonistic to abscisic acid's (ABA) role in promoting dormancy.
More Questions from PLANT GROWTH AND DEVELOPMENT
Practice All Chapter MCQs →
Assertion(A): Dedifferentiated cells can only undergo redifferentiation.
Reason(R): Cork and secondary phloem are the products of differentiation Plants follow …A… pathways in response to environment or phases of life to form different kind of structures. This ability is called …B… Complete the given statement with the correct combination of options Rapid and dramatic increase in shoot length is called Some plants were kept under 15 hours of daylight and 9 hours of night. They started producing flowers. However in some of them night was interrupted by a brief flash of light resulting in failure of flowering to take place. This plant is a- Which of the following statements are fals regarding ethephon?
(A) A source of ethylene.
(B) It is slowly absorbed and transported within the plant to release ethylene rapidly
(C) It causes reduced abscission in flowers anc fruits of cotton.
(D) Supresses the internode elongation in deep water rice plants. Heterophylly can be observed in
I. cotton
II. coriander
III. larkspur
Select the right option
Reason(R): Cork and secondary phloem are the products of differentiation Plants follow …A… pathways in response to environment or phases of life to form different kind of structures. This ability is called …B… Complete the given statement with the correct combination of options Rapid and dramatic increase in shoot length is called Some plants were kept under 15 hours of daylight and 9 hours of night. They started producing flowers. However in some of them night was interrupted by a brief flash of light resulting in failure of flowering to take place. This plant is a- Which of the following statements are fals regarding ethephon?
(A) A source of ethylene.
(B) It is slowly absorbed and transported within the plant to release ethylene rapidly
(C) It causes reduced abscission in flowers anc fruits of cotton.
(D) Supresses the internode elongation in deep water rice plants. Heterophylly can be observed in
I. cotton
II. coriander
III. larkspur
Select the right option