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NEET UG BIOLOGY MCQ: PLANT GROWTH AND DEVELOPMENT
1
Hard
1 of 1
Understanding
+4 | -1
Consider the following statements and select the correct option stating which one is true (T) and which one is false (F)
i) Vernalisation can help in shortening the juvenile or vegetative period of plant and bring early flowering.
ii) Phytochrome is a pigment protein complex which exists in two inter convertible forms , and
iii) Sugar beet flowers after getting the inductive cycle of long dark periods and short photoperiods.
iv) 2, 4-D acts as weedicide to remove broad leaved weeds.
v) Auxins promote growth of lateral buds whereas cytokinins inhibit it
i) Vernalisation can help in shortening the juvenile or vegetative period of plant and bring early flowering.
ii) Phytochrome is a pigment protein complex which exists in two inter convertible forms , and
iii) Sugar beet flowers after getting the inductive cycle of long dark periods and short photoperiods.
iv) 2, 4-D acts as weedicide to remove broad leaved weeds.
v) Auxins promote growth of lateral buds whereas cytokinins inhibit it
View answer and explanation
Correct option: B
i - T, ii - T, iii - T, iv - T, v - F
The correct answer is D (i - T, ii - T, iii - F, iv - T, v - F) because statements i, ii, and iv are true, while statements iii and v are false.
More Questions from PLANT GROWTH AND DEVELOPMENT
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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