Question

Eggs of anopheles are:
a. Singly laid with air floats
b. Singly laid without floats
c. Laid in groups with float
d. Laid in groups without float

Answer 1

Hint: The which was first described by a scientist named J. W. Meigen in the year of 1818 is Anopheles. It is said that around 460 species are recognized by this scientist. Among which about 100 can transmit human malaria. Only about 30–40 normally communicate vermin of the genus Plasmodium, which causes malaria in humans in endemic areas.

Complete answer:
- One of the best-known genera of mosquito is Anopheles gambiae is, for the reason of its major role in the communication of the utmost hazardous malaria parasite types.
- Just in the way of all the other mosquitoes, anophelines go through four stages in their life cycles. They are egg, larva, pupa, and imago (the Adult stage). As we know that, the first three stages of this organism are aquatic and together they last for 5–14 days.
- It normally depends upon the kind and the ambient temperature (the surrounding temperature). When the female Anopheles mosquito acts as a vector of the disease of malaria, it means the female Anopheles mosquito is in the adult stage.
- It is said that the Anopheles mosquito places the eggs one at a time making them stick together in the form of a raft. Around 100 to 400 eggs are present in the egg raft.
- The egg laid by Anopheles air bubbles exists amid the upper ends which assist the raft to float on water. It means eggs are separately placed with air floats. Thus, the Eggs of Anopheles are singly laid with air floats.

Hence, the correct answer is option (A).

Note: With the evidence of research of a few years, the scientist says that the mosquitoes diverged 260 million years ago. People say that it is around 120 million years ago and 150 million years ago that the culicine and Anopheles clades of mosquitoes diverged. It was between 80 million years ago and 95 million years ago, the species of the old and New World Anopheles were made to subsequently diverge. It was 100 million years ago that the Anopheles darlingi deviated from the African and Asian malaria routes.