The main excretory organs of insects and spiders are
The main excretory organs of insects and spiders are Malpighian tubules.
Which of the following animals is used for transport in Tibet?
Which of the following is the smallest bird in the world?
Which of the following creatures is oviparous?
Which of the followings is the national bird of China?
What is the distinctive characteristic of 'marsupials'?
Saiga is a rare type of which species?
Which of the following is used to control pest fish?
........ is a true marine fish.
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