Explore topic-wise InterviewSolutions in .

This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.

1.

Go through the following statements (i) The most widely used compound as source of ethylene is ethephon. (ii) Ethylene helps the plants to increa their absorption surface by promotin root growth and root hair formation. (iii) 2, 4 - D is mainly used to kill mature monocotyledonous plants. (iv) Spraying juvenile conifers with GAs has- tens the maturity period, thus leading to early seed production. Which of these are correctA. (i) & (iv)B. (i), (ii) & (iv)C. (i), (iii) & (iv)D. (ii), (iii) & (iv)

Answer» Correct Answer - B
2,4-D is widely used to kill dicot weeds,does not affect mature monocot plants.
Discussion
2.

Hormone similar to animal steroidal hormone isA. auxinB. gibberellinC. ethyleneD. Cytokinin

Answer» Correct Answer - B
Gibberellin has 4 isperene units and is similar to a steroid in sttructure.
Discussion
3.

Morphogenesis is controlled by an interaction betweenA. auxins and gibberellinsB. auxins and cytokininsC. gibberellins and cytokininsD. none of the above

Answer» Correct Answer - B
In some of the species , auxins and gibberelins have a similar effect .
Discussion
4.

A photoblastic seed is gives following treatment. In which case germination of seeds will be maximum ? (R = red light of 660 m`mu` and Fr= far red light of 730 m`mu`)A. Seeds + FrB. Seeds + R + FrC. Seeds + R + Fr + RD. Seeds + R + Fr + R + Fr

Answer» Correct Answer - C
Red light promotes germination of seeds.It is the nature of light given in last expouse that detemines the germination of seeds.
Discussion