set 4 MCQ Questions & Answers Detailed Explanation

Question : 1

Respiration in plants

a) results in the formation of vitamins

b) is characteristic of all living cells

c) occurs only during day

d) often requires CO₂

Question : 2

Functional and structural unit of kidney is

a) seminiferous tubule

b) nephron

c) acini

d) None of these

Question : 3

The dead element present in the phloem is

a) phloem fibres

b) companion cells

c) phloem parenchyma

d) sieve tube

Question : 4

Growth is primarily affected by two climatic factors which are –

a) Temperature and relative humidity

b) Light and wind

c) Light and temperature

d) Rainfall and temperature