★ The given figure shows human digestive system with some parts labelled as P, Q, R and S. Which of the following labelled parts is correctly matched with its function?
A Q – Food is mixed with digestive juices
B P – Digestion starts here
C R – Most of the water is absorbed here
D S – Digestion of food is completed here
The chemical reaction due to passage of electric current depends on
(B) Magnitude of current
(C) Density of liquid
(D) All of these.
Why density of liquid or magnitude of current is not important?
Study the two life cycles carefully.
Which of the following statements is true about the life cycles given here?
AIn both the life cycles, newly hatched young ones do not resemble the adults.
BIn both the life cycles, all stages occur in water.
CIn both the life cycles, the newly hatched young ones resemble the adults.
DIn both the life cycles, the adults moult many times.