K.C.S.E Biology Q & A - MODEL 2011PP2QN05

K.C.S.E Biology Q & A - MODEL 2011PP2QN05

The diagram below represents a flower.

(i) On the diagram, name two structures where meiosis occurs. 
(ii) How is the flower adapted to prevent self-pollination? 
(ii) How is the flower adapted to prevent self-pollination? 
(b) The diagram below represents a human reproductive organ.

​(i) Explain two adaptations of the structure labelled L to its functions. 
(ii) Explain the role of the gland labelled K.

answers

​(a) (i) Anthers; Ovary; 
(ii) Anthers are below the stigma to minimise self pollination;

• petals are large/conspicuous, for insects to land on/ to attract insects encouraging cross pollination;
• presence of interstitial cells that secrete androgens. 

(b) (i) L is hanging outside the body to ensure optimal temperature for sperm
production; it has many, long and coiled seminiferous tubules to increase the
surface area for production/storage of sperms; 
(ii) K produces an alkaline fluid that neutralizes acid in the vagina; this fluid
contain nutrients for the sperms; and also activates sperms;