CBSE
Multiple Choice QuestionsThe asscoiation that includes herbivores and phytophagous insects is called
Competition
Parasitism
Predation
Commensalism
Commensalism
Many fresh water animals cannot live for long in sea water mainly because of the
Change in the atmosphere
Change in the levels of thermal tolerance
variations in light intensity
Osmotic problems they would face
Osmotic problems they would face
The following figure given below is a diagrammatic representation of organismic response to abiotic factors. What do (a), (b) and (c) represent respectively?
(A) Conformers (B) Regulators (C) Partial regulators
(A) Regulators (B) Partial regulators(C) Conformers
(A) Partial regulators (B) Regulators (C) Conformers
(A) Partial regulators (B) Conformers (C) Regulators
(A) Partial regulators (B) Conformers (C) Regulators
Allen's rule applies to
Tribes living in high altitudes
Mammals from colder climates
Fish living in Antarctic waters
Desert lizards
Desert lizards
Which of the following statements regarding responses of organisms to abiotic factors is false?
All birds and mammals are capable of thermoregulation.
Majority of animals and nearly all plants cannot maintain a constant internal environment.
Shivering is a kind of exercise which produces heat and raises body temperature.
Very small animals are commonly found in polar regions as they have to spend less energy to generate body heat
Very small animals are commonly found in polar regions as they have to spend less energy to generate body heat
Pick out the correct option from (a) to (e)
(A) Primary succession begins in areas where natural communities have been destroyed
(B) Hydrarch succession takes place in water
(C) The climax community is the community that is in near equilibrium with the immediate environment
(D) In newly cooled lava secondary succession occurs
(A) and (B) are correct, (C) and (D) are incorrect
(B) and (C) are correct, (A) and (D) are incorrect
(A) and (D) are correct, (B) and (C) are incorrect
(B) only is correct, (A), (C) and (D) are incorrect
(B) only is correct, (A), (C) and (D) are incorrect
Match mean annual precipitation in Column I with the biome in Column II and choose the right option.
| Column I | Column II |
| 1. 0-50 cm | A. Tropical forest |
| 2. 50-100 cm | B. Coniferous forest |
| 3. 150-400 cm | C. Grassland |
| 4. 50-250 cm | D. Desert |
1 - D; 2 - C; 3 - A; 4 - B
1 - C; 2 - A; 3 - B; 4 - D
1 - C; 2 - D; 3 - A; 4 - B
1 - B; 2 - D; 3 - A; 4 - C
1 - B; 2 - D; 3 - A; 4 - C
An orchid growing as an epiphyte on a mango tree is an example for
Parasitism
Predation
Commensalism
Mutualism
Mutualism
Match Column I with Column II and choose the right option.
| Column I | Column II |
| 1. Thomas Malthus | A. Branching descent |
| 2. Hugo deVries | B. Studies on populations |
| 3. Charles Darwin | C. Use and disuse theory |
| 4. Lamarck | D. Saltation |
1 - D; 2 - A; 3 - C; 4 - B
1 - B; 2 - D; 3 - A; 4 - C
1 - B; 2 - D; 3 - C; 4 - A
1 - C; 2 - B; 3 - A; 4 - D
1 - C; 2 - B; 3 - A; 4 - D
In the equation, where r stands for
Intrinsic rate of natural increase
Death rate
Population density at time t
Carrying capacity
Carrying capacity
