Question

(a)What are vectors?

(b)In many species of mosquitoes the males do not prefer human blood, but females do. State why?

Answer 1

1. Vectors are organisms that act as a medium for transferring disease causing microorganisms to the human body. They carry those microorganism in them and transfer them into the human body when they come in their contact, like mosquitoes.

2. Female mosquitoe need human blood for making their eggs using protein and iron from the blood. Males does not make eggs so they do not need human blood.