Explanation

• Membranes present around the embryo are Chorion
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• Chorion is also called Serosa
• in reptiles, birds, and mammals, the outermost membrane around the embryo.
• It develops from an outer fold on the surface of the yolk sac.
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• The fetal membranes or extraembryonic membranes, are membranes associated with the developing fetus.
• The two chorioamniotic membranes are the amnion and the chorion
  

Explanation

Entomology is the study of insects and their relationship to humans, the environment, and other organisms.

while

Zoology is the study of all animals.

Biology is a natural science concerned with the study of life and living organisms.

Etymology investigates and documents the lives.

Explanation

A hutch is a type of cage used typically for housing domestic rabbits.

Other small animals can also be housed in hutches such as guinea pigs, ferrets,

Explanation

Philology is the study of languages in written historical sources.

It includes the analysis of literary texts, history, and the development of languages.

Explanation

Water has maximum density at 4°C.

When Water is in its Solid form (Ice) below 0°C.