Clemmensen reduction of a ketone is carried out in the presence of which of the following reagent?

1) $$Zn-Hg$$ with $$HCl$$
2) $$LiAl{H}_{4}$$
3) $${H}_{2}$$ and $$Pt$$ as catalyst
4) Glycol with $$KOH$$

Dumb-bell shaped guard cells are characteristic of the stomata of

1) all monocotyledonous leaves
2) grass leaves only
3) xerophytic leaves only
4) some dicot and monocot leaves

To tolerate water stress, plants in deserts develop

(1) Long root system which reaches to the water level

(2) No stomatal activity

(3) Both (1) and (2)

(4) Stems which are modified into leaf-type

During a woman's life time she produces about:

 (1) 400 eggs
 (2) 4000 eggs
 (3) 365 eggs
 (4) 40 eggs

 If light ray is reflected from the denser medium, the path difference produced in the reflected ray will be :

(1) λ/4

(2) λ/2

(3) λ

(4) zero

In Oogenesis nutritive substance are synthesised during
 1) Multiplication phase
 2) Growth phase
 3) Maturation phase
 4) All the three

Radius of the Earth were increased by a factor of 3 and its mass remained the same, then the acceleration due to gravity on the Earth would
 
 1) reduce by a factor of 3
 2) reduce by a factor of 9
 3) increase by a factor of 3
 4) increase by a factor of 9

The Calyx in some flowers falls off as soon as the flower opens

 1) decidons
 2) caducons
 3) persistent
 4) anistomerons

Which of the following phytohormones brings about the negative gravitropism of roots and the positive gravitropism in stem?

(1)     GA            (2)     ABA

(3)     IAA            (4)     None

Chloragogen cells of Pheretima have similar function like the vertebrate 

1) Kidney
2) Malpighian corpuscle
3) Liver
4) Lungs