Active transport involves

(a)

Movement of molecules from lower to higher concentrations

(b)

Expenditure of energy

(c)

It is an uphill task

(d)

All of the above

During transpiration there is loss of

(a)

Carbon dioxide

(b)

Oxygen

(c)

Water

(d)

None of the above

Which of the following process requires energy?

(a)

Active transport

(b)

Diffusion

(c)

Osmosis

(d)

All of them

Which is the correct sequence of  blood flow

(a)

Ventricle → atrium → vein → arteries

(b)

Atrium → ventricle → veins → arteries

(c)

Atrium → ventricle → arteries → vein

(d)

Ventricles → vein → atrium → arteries

‘Heart of Heart’ is called

(a)

SA node

(b)

AV node

(c)

Purkinje fibres

(d)

Bundle of His