Question

The eggs of some mammals have more yolk. They are

• A. Aquatic mammals
• B. Metatherians
• C. Protherians
• D. Eutherians

Answer 1

The correct option is C Protherians

Human eggs can be divided on the basis of amount of yolk present in them.

Alecithal eggs- No amount of yolk is present, e.g., humans and other placental mammals.

Microlecithal egg- Minimal amount of yolk is present, e.g., Echinoderms, marsupials etc.

Mesolecithal egg- Moderate amount of yolk is present,e.g., amphibians.

Macrolecithal egg- Large amount of yolk is present,e.g., birds' eggs, Prototherians etc.

So the correct answer is C.