Q2 of 30 Page 1

State one reason for adding blue-green algae to the agricultural soil.

Blue-Green algae is added to agriculture soil to increase the fertility of soil. It fixes the atmospheric nitrogen and convert them tousle nitrogenous compounds in the soil.


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1

Name the material used as matrix in gel-electrophoresis and mention its role.

 3

Give one example each of a fungus which reproduces by:

(a) Budding


(b) Conidia


 4

State one reason why breast-feeding the baby acts as a natural contraceptive for the mother.

 5

Identify and write the correct statement:

(a) In Grasshopper males two sex chromosomes are X and Y type.


(b) In Grasshopper males there exist XO type of sex-determinants.