NEET UG BIOLOGY MCQ: 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

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Correct option: C

Assertion is true but Reason is false

Option D is correct because both the assertion and the reason are false. Dedifferentiated cells can undergo both redifferentiation and dedifferentiation again, and cork and secondary phloem are products of redifferentiation, not just differentiation.

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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?

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(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
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II. coriander
III. larkspur
Select the right option
Measurement and comparison of total growth in geometrical growth of a plant per unit time is called