Organisms like mosquito, leech and bed bug which suck the blood of other animals are called ___ .

Q. Which is common for bed-bug, leech and mosquito?

Q. Which of the following characteristics is common in leech, mosquito, bed bug and rat?

Q. The organs P and Q of two animals have different structures but similar functions. On the other hand, the two organs R and S of two other animals have the same basic structure but different functions.
(a) What are the organs like P and Q known as?
(b) Name the organs like P and Q. Also name the animals which have such organs.
(c) What are the organs like R and S called?
(d) Name the organs like R and S. Also name the animals which have such organs.

Q.

Agents like mosquitoes and rat fleas that carry disease-causing organisms are called _________.

Q. The world of living organisms like plants and animals is called the _________ world.