Organisms and Population

Select the false statement –

• (a) Average temperature on land varies seasonally

• (b) Temperature progressively decreases from pole to equator

• (c) Temperature progressively decreases from plains to mountain tops

• (d) Our intestine is a unique habitat for hundreds of species of microbes

A few organisms can tolerate and thrive a wide range of temperature. Such animals are called ___________. A vast majority of animals are restricted to a narrow range of temperature. Such animals are called __________.

• (a) Eurythermal, stenothermal

• (b) Stenothermal, eurythermal

• (c) Thermoscopic, Unthermoscopic

• (d) Thermophobic, thermophilic

Which of the following is the most ecologically relevant environmental factor?

• (a) Water

• (b) Light

• (c) Temperature

• (d) Soil

False statement is –

• (a) habitat includes both biotic and abiotic factors

• (b) Ecology at the organismic level is essential physiological ecology

• (c) Abiotic and biotic components interact constantly with each other

• (d) None of the above

What are the key elements that lead to so much variation in the physical and chemical conditions of different habitats?

• (a) Temperature and light

• (b) Soil and water

• (c) Only soil

• (d) Temperature, light, soil and water

Major biomes of India include –

• (a) Tropical rain forest

• (b) Deciduous forest

• (c) Desert and sea coast

• (d) All

A regional ecological unit having a specific climate is –

• (a) Biome

• (b) Landscape

• (c) Ecosystem

• (d) Biotic community

Basic unit of ecological hierarchy is –

• (a) Ecosystem

• (b) Community

• (c) Population

• (d) Individual

Which of the following accounts for the formation of major biomes?

• (a) Annual variations in intensity of temperature

• (b) Annual variations in intensity and duration of temperature

• (c) Annual variation in precipitation

• (d) b and c

Ecology is basically concerned with four levels of biology organizations. These levels are –

• (a) Organisms, populations, communities and biomes

• (b) Organisms and communities, species and population

• (c) Species, populations, biomes and organisms

• (d) Organisms, populations, biomes and species