मराठी

The height of a plant is regulated by ______. - Science

Advertisements
Advertisements

प्रश्न

The height of a plant is regulated by ______.

पर्याय

  • DNA is directly influenced by growth hormones.

  • Genes which regulate the proteins directly.

  • Growth hormones are under the influence of the enzymes coded by a gene.

  • Growth hormones are directly under the influence of a gene.

MCQ
रिकाम्या जागा भरा

उत्तर

The height of a plant is regulated by Growth hormones under the influence of the enzymes coded by a gene.

Explanation:

Under the control of the enzymes that the gene codes for, growth hormones control the plant's height. The amount of growth hormones a plant produces is dependent on the effectiveness of the relevant enzyme. Effective enzymes generate more of the hormone, which causes the plant to grow taller. However, if the enzymes are less effective, less hormone is released, which causes the plant to become stunted.

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
2023-2024 (March) Board Sample Paper by shaalaa.com

संबंधित प्रश्‍न

How is the movement of leaves of the sensitive plant different from the movement of a shoot towards light?


The bending of the root of a plant away from a source of light is caused by a plant hormone called :
(a) cytokinin
(b) gibberellin
(c) abscisic acid
(d) auxin


How is movement in plants different from that in animals?


What is meant by positive and negative tropic movements in plants? Explain them by giving suitable examples. 


The response of a plant part towards gravity is ______.


In the given figure (a), (b) and (c), which appears more accurate and why?

(a) (b) (c)
 

What does a Mimosapudica plant do in response to touch? What is the phenomenon known as?


Why do roots of halophytes show negative geotropism?


While conducting experiments to study the effects of various stimuli on the plants, it was observed that the roots of plant X grow and bend towards two stimuli A and B but bend away from a third stimulus C. The stem of the plant X however bends ” away from stimulus A and B but bends towards the stimulus C. The stimulus B is known to act on the roots due to factors related to Earth. Keeping these points in mind, answer the following questions:

  1. What could be stimulus A?
  2. Name the stimulus seen in B.
  3. What could be stimulus-C?

Study the diagrams given below and answer the following questions:

  1. Name the structures shown as X and Y in the figures (A) and (B), respectively.
  2. Write the functions performed by the structures X and Y.
  3. Name the phenomenon depicted and define it.
  4. How do the structures X and Y differ from each other?
  5. Give examples of the plants which show the said phenomenon.

Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×