set 4 MCQ Questions & Answers Detailed Explanation

Question : 1

Consider the following statements :

1. Aerenchyma tissue are found in hydrophytes.
2. Number of stomata is less and sunken in xerophyte.
3. Velamen tissue in orchids are found in root.

a) 2 only

b) 1, 2 and 3

c) 3 only

d) 1 only

Question : 2

Which of the following commonly called emergency gland of body?

a) Testis

b) Thymus

c) Adrenal

d) Pituitary

Question : 3

The chief function of vessels in the plant body is

a) to conduct water and mineral salts

b) to translocate food material

c) to support living cells

d) all above

Question : 4

Photosynthetically active radiation is represented by the range of wavelength of

a) 400 – 700 nm

b) 500 – 600 nm

c) 340 – 450 nm

d) 400 – 950 nm

Question : 5

Chief function of leaves are

a) respiration and photosynthesis

b) respiration and digestion

c) transpiration and photosynthesis

d) respiration and transpiration

Question : 6

Which one of the following parts of the human brain is the regulating centre for swallowing and vomiting?

a) Cerebrum

b) Medulla oblongata

c) Cerebellum

d) Pons