141: The process of light exposure in a 24-hour cycle that controls the growth and development of certain plants and animals is called:
(a) Photosynthesis
(b) Photoionisation
(c) Photoperiodism
(d) Photoluminescence
142: Which one of the following chemicals is responsible for the depletion of ozone layer in the atmosphere?
(a) Chlorofluorocarbons
(b) Nitrous oxide
(c) Sulphur dioxide
(d) Carbon dioxide
143: Khaira is a plant disease caused due to the deficiency of:
(a) Iron
(b) Carbon
(c) Zinc
(d) None of the above
144: Consider the following :
1. Bats
2. Bears
3. Rodents
The phenomenon of hibernation can be observed in which of the above kinds of animals?
(a) 1 and 2 only
(b) 2 only
(c) 1, 2 and 3
(d) Hibernation cannot be observed in any of the above.
145: Consumption of fish is considered to be healthy when compared to flesh of other animals because fish contains
(a) polyunsaturated fatty acids
(b) saturated fatty acids
(c) essential vitamins
(d) more carbohydrates and proteins
Explanation:
Gish contains high levels of polyunsaturated fatty acids and low levels of saturated fatty acids than other sources of flesh. In beef and pork it is 4 - 10% and in chicken 25-30%. But in fish it is above 50%.