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Practice each question, then open the answer or worked solution.
Autecology is the:
a. Relation of heterogeneous populations to their environment
b. Relation of an individual to their environment
c. Relation of a community to its environment
d. Relation of a biome to its environment
Option (b) is the answer.
Ecotone is:
a. A polluted area
b. The bottom of a lake
c. A zone of transition between two communities
d. A zone of developing community
Option (c) is the answer.
Biosphere is:
a. a component in the ecosystem
b. composed of the plants present in the soil
c. life in the outer space
d. composed of all living organisms present on earth which interact
with the physical environment
Option (d) is the answer.
The ecological niche is:
a. the surface area of the ocean
b. an ecologically adapted zone
c. the physical position and functional role of a species within the
community
d. formed of all plants and animals living at the bottom of a lake
Option (c) is the answer.
According to Allen’s Rule, the mammals from colder climates have:
a. shorter ears and longer limbs
b. longer ears and shorter limbs
c. longer ears and longer limbs
d. shorter ears and shorter limbs
Option (d) is the answer.
Salt concentration (Salinity) of the sea measured in parts per
thousand is:
a. 10 – 15
b. 30 – 70
c. 0 – 5
d. 30 – 35
Option (d) is the answer.
Formation of tropical forests needs mean annual temperature and mean
annual precipitation as:
a. 18 – 25°C and 150 – 400 cm
b. 5 – 15°C and 50 – 100 cm
c. 30 – 50°C and 100 – 150 cm
d. 5 – 15°C and 100 – 200 cm
Option (a) is the answer.
Which of the following forest plants controls the light conditions at the
ground?
a. Lianas and climbers
b. Shrubs
c. Tall trees
d. Herbs
Option (c) is the answer.
What will happen to a well-growing herbaceous plant in the forest if it is
transplanted outside the forest in a park?
a. It will grow normally
b. It will grow well because it is planted in the same locality
c. It may not survive because of a change in its micro-climate
d. It grows very well because the plant gets more sunlight
Option (c) is the answer.
If a population of 50 Paramoecium present in a pool increases to 150
after an hour, what would be the growth rate of the population?
a. 50 per hour
b. 200 per hour
c. 5 per hour
d. 100 per hour
Option (d) is the answer.