Exercise 2

Question 26 :

Plants are killed in winter by frost

A). because of desiccation and mechanical damage to the tissues
B). because no photosynthesis takes place at such low temperature
C). because respiration ceases at such low temperature
D). because there is no transpiration
Answer : Option A

Question 27 :

One of the following is most suitable for study of mutations

A). Haploids
B). Diploids
C). Tetraploids
D). Polyploid
Answer : Option A

Question 28 :

Pulses are a good source of

A). carbohydrates
B). fats
C). proteins
D). vitamins
Answer : Option C

Question 29 :

Oxygen in our blood is transported by a protein named

A). haemoglobin
B). keratin
C). collagen
D). myoglobin
Answer : Option A

Question 30 :

Nymph is the name of young one of

A). butterfly
B). beetle
C). housefly
D). cockroach
Answer : Option D