Q4 of 30 Page 1

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

A breast feeding mother produces less Oestrogen than normal so she does not ovulate which delays the onset of ovulation cycle.Hence, it acts a natural contraceptive for the mother.


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2

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

 3

Give one example each of a fungus which reproduces by:

(a) Budding


(b) Conidia


 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.


 6

What will happen if DNA replication is not followed by cell division in a eukaryotic cell?