Question

why egg cells are spherical in shape

Answer 1

when cells divide, they lose their square shape and they become spherical

IF IT HELPS YOU

Answer 2

If eggs were rectangular little boxes, they would be very strong on the corners, but very weak in the middle of the straight walls. (They would also be extremely uncomfortable for the chicken to lay.)The strongest shape of all is a ball, or sphere. But if you were to push or gently nudge a spherical egg, it would roll away downhill, never to be seen again.So one reason that eggs have an asymmetric tapered oval shape is that if you nudge them, they'll come back to you. They'll sweep out a circle around the pointed end, and come to a stop with the pointed end facing uphill. In fact, the eggs of birds that have their nests on cliffs are more oval than the eggs of birds that nest on the ground. This means the 'more-oval' eggs of these cliff-nesting birds will roll in a very tight little circle, and be less likely to roll out of the nest — and off the cliff.Another reason for eggs to be egg-shaped is that they fit together quite snugly in the nest, with only small air spaces between them. This means the eggs radiate their heat onto each other, and keep each other warm. And of course, you can fit more eggs into the nest.Yet another reason that eggs are tapered is so that they can get pushed out of the hen. It sounds intuitively wrong and extremely uncomfortable, but eggs are laid with the blunt end coming out first, followed by the tapered end. In fact, the physics of pushing-an-egg-out tells us that eggs have to come out