2696: Assertion (A):
Scientists can cut apart and paste together DNA molecules at will, regardless of the source of the molecules.
Reason (R):
DNA fragments can be manipulated using restriction endonucleases and DNA ligases.
(a) Both A and R are individually true and R is the correct explanation of A
(b) Both A and R are individually true but R is NOT a correct explanation of A
(c) A is true but R is false
(d) A is fasle but R is true
2697: Which one of the following is useful for biological control of pests?
(a) Honey bees and locusts
(b) Scorpions and spiders
(c) Wasps and birds
(d) Parrots and kites
2698: The clouds float in the atmosphere because of their low
(a) temperature
(b) velocity
(c) pressure
(d) density
2699: Which one of the following reflects back more sunlight as compared to other three ?
(a) Sand Desert
(b) Paddy crop land
(c) Land covered with fresh snow
(d) Prairie land
2700: Examine the following statements:
1. Lady's finger is tastier than cabbage
2. Cauliflower is tastier than lady's finger
3. Cabbage is not tastier than peas
The conclusion that can be drawn from these statements is that
(a) Peas are as tasty as lady's finger
(b) Peas are as tasty as cauliflower and lady's finger
(c) Cabbage is the least tasty of the four vegetables
(d) Cauliflower is tastier than cabbage