Which of the following is used mainly for balancing in fi...
Which of the following is used mainly for balancing in fish?
the caudal fin
the pectoral fin
the anal fin
the dorsal fin
Correct answer is D
The dorsal fin helps fish keep their balance.
A bat's wing and that of a bird, a whale's flippers and the fish's f...
Why poor soil is treated with lime is to increase the quantity of ...
Water loss is regulated in plants and animals by both the ...
Which of the following pH values is the best for the action of the enzymes: renin and pepsin in...
Which of these factors least affects population size? ...
Which of the following statements about heredity is not true? In heredity the traits are ...
In the diagram of the human sperm above, the function of the part labelled II is to ...
Which of the following ecological factors causes food shortage? ...