43. Chemotropic stimulus to pollen tube is provided in the form of
(a) K* (b) Ca 2 (c) CH (d) Mn *2
Answers
Answer:
Chemotropism is the growth of organisms (or parts of an organism, including individual cells) such as bacteria and plants, navigated by chemical stimulus from outside of the organism or organisms part. The response of the organism or organism part is termed positive if the growth is towards the stimulus or negative if the growth is away from the stimulus.
An example of chemotropic movement can be seen during the growth of the pollen tube, where growth is always towards the ovules. It can be also written that conversion of flower into fruit is the example of chemo-tropism.
Fertilization of flowers by pollen is achieved because the ovary releases chemicals that produce a positive chemotropic response from the developing pollen tube.
Therefore, the correct answer is option A.
Explanation:
please mark answer as branalist