Question

a) Explain any three directional movement in plant. b) How brain and spinal cord are protected in human.c) Name the master gland present in brain.

Answer 1

Answer:

a) Thigmotropic movement, geotropism, chemotropism.

b) Meninges are membranes that cover and protect the brain and spinal cord.

c) Pituitary gland.

Explanation:

a) Thigmotropic movement is caused when the stimulus causes the tendrils to grow towards the direction of support for climbing.

Geotropism is the growth of roots towards the force of gravity, or in simple words, the growth of plants in response to gravity.

Chemotropism is the response due to chemical stimuli. In this case, pollen grains.

c) The pituitary gland is called the master gland of the body because it regulates the activity of the endocrine glands.