Question

Animal eggs with rich yolk content are called ______.

Options

• microlecithal

• homolecithal

• telolecithal

• alecithal

Answer 1

Animal eggs with rich yolk content are called telolecithal.

Explanation:

• Animal eggs with rich yolk content are called telolecithal because the yolk is concentrated at one pole (vegetal pole) while the other pole (animal pole) contains less yolky cytoplasm and the nucleus.
• This type of egg with abundant yolk supports the nourishment of the developing embryo, typical of many vertebrates and some invertebrates.
• The other types are alecithal (little or no yolk), microlecithal (small amount of yolk), and homolecithal, which refers to even yolk distribution, but telolecithal specifically denotes eggs with rich yolk content concentrated in one region.