What would be the number of chorosomes of the aleurone cells of a plant with 42 chromosomes in its root tip cells?

(1) 63

(2) 84

(3) 21

(4) 42

Which one of the following plants is monoecious?

(1) Marchantia

(2) Pinus

(3) Cycas

(4) Papaya

Flowers are unisexual in

(1) pea

(2) cucumber

(3) china rose

(4) onion

A scion is grafted to a stock. The quality of fruits produced will be determined by the genotype of 

(1) stock

(2) scion

(3) both stock and scion

(4) neither stock nor scion.

Which form of reproduction is correctly matched?

(1) Euglena → transverse binary fission

(2) Paramecium → longitudinal binary fission

(3) Amoeba → multiple fission

(4) Plasmodium → binary fission

Which one of the following methods is commonly used to maintain the genetic traits of a given plant?

(1) By propagating through seed germination

(2) By propagating through vegetative multiplication

(3) By generating hybrids through intergeneric pollination

(4) By treating the seeds with gamma radiations

Which animal has the longest gestation period?

(1) Shark

(2) Walrus

(3) Elephant

(4) Dog

The ploidy of bread wheat is 

(1) 4 n

(2) 6 n

(3) 2 n

(4) 8 n

Life span of parrot is 

(1) 140 years

(2) 60 years

(3) 80 years

(4) 40 years

No individual is immortal except:

(1) Single celled organisms

(2) Green plants

(3) Sponges

(4) Drones