ovum features- lqc 2a

Question 1

importance of the ovum being large

Answer 1

Many sperm able to fit round it, so increased chance of fertilisation. Contains more lipid droplets, so more energy for developing embryo.

Question 2

importance of zone pellucida in the ovum

Answer 2

Hardens when one sperm has entered to prevent polyspermy

Question 3

importance of the cortical granules (lysosomes) in ovum

Answer 3

Release enzymes which cause the zona pellucida to harden to prevent polyspermy (more than one sperm entering the ovum )

Question 4

importance of the Cytoplasm with proteins + lipid droplets in ovum

Answer 4

Food source to supply energy for cell division of the fertilised ovum, until implantation