Q. No.Shrews and Humming Birds are not capable of regulating body temperature because
1. Thermoregulation is energetically expensive
2. Higher surface area to volume ratio
3. Both 1 and 2
4. Thermoregulation is not a function of energy
Formation of wide variety of habitats takes place by:-
1. Types of species inhabiting that area
2. Types of predation
3. Regional and local variation of environment conditions
4. All of the above
Reason(R): They would face osmotic problems if placed in seawater.
Choices for Assertions and reasons:
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Consider the following statements (A)-(D) each with one or two blanks:
| (A) | Bears go into _____(1)_____ during winter to _____(2)_____ cold weather. |
| (B) | A conical age pyramid with a broad base represents _____(3)_____ human population. |
| (C) | A wasp pollinating a fig flower is an example of _____(4)_____ . |
| (D) | An area with high levels of species richness is known as _____(5)_____ . |
Which of the following options, gives the correct fill-ups for the respective blank numbers from(1) to (5) in the statements?
| 1. | (1) - hibernation, (2) - escape, (3) - expanding, (5) - hot spot |
| 2. | (3) - stable, (4) - commensalism, (5) - marsh |
| 3. | (1) - aestivation, (2) - escape, (3) - stable, (4) - mutualism |
| 4. | (3) - expanding, (4) - commensalism, (5) - biodiversity park |
When we migrate from dark to light, we fail to see for sometimes but after a time visibility becomes normal. It is an example of:
1. Accommodation
2. Adaptation
3. Mutation
4. Photoperiodism
State True (T) or False (F) for the following statements and select the correct option
a. Mammals from colder climates generally have smaller ears and limbs to minimize the heat loss.
b. Experience of altitude sickness is due to high atmospheric pressure at high altitudes.
c. The size of a population for any species is not a static parameter.
d. Resources for growth for most of the animal population are infinite and become limiting sooner or later.
a b c d
1. T T T T
2. F T T F
3. F F F F
4. T F T F
Match the column A with column B :-
A B
a. phytophagous insects i) A stage of suspended development
b. Diapause ii) To avoid summer related problem
c. Homeostasis iii) feeding on plant sap
d. Aestivation iv) Maintenance of constant internal environment
1. a-(iv), b(ii), c-(iii), d-(i)
2. a-(iii), b(i), c-(iv), d-(ii)
3. a-(i), b(iii), c-(ii), d-(iv)
4. a-(iii), b(ii), c-(iv), d-(i)
Formation of tropical forests needs mean annual temperature and mean annual precipitation as
1. 18-25°C and 150-400 cm
2. 5-15°C and 50- 100 cm
3. 30-50°C and 100- 150 cm
4. 5-15°C and 100- 200 cm
Many freshwater animals cannot live for long in sea water and vice versa because of:
1. Buoyancy related problems
2. Lack of impermeable skins
3. Thermolabile enzymes
4. Osmotic considerations
Aquatic organisms face problems when water quality gets disturbed. Here water quality includes
1. Chemical composition, temperature, pH
2. Chemical composition and pH
3. Only pH
4. pH and temperature
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