Question

why are embryos of oviparous animals covered with a number of protective layers​

Answer 1

Explanation:

• Oviparous animals undergo external fertilisation, while viviparous animals undergo internal fertilisation. The zygote undergoes rapid division after fertilisation and moves down the oviduct. During this period, many protective layers form as a hard shell around the developing embryo.

Answer 2

Answer:

The fusion of ovum and sperm is called fertilization. The fertilized egg is called a zygote. ... Animals such as hen, frog, lizard and butterfly which lay eggs are called oviparous animals. The transformation of the larva into adult through drastic changes is called metamorphosis.