Free Forest Ecology MCQs with Answers

• A. Food
• B. Maintenance of ecosystem
• C. Industrial use
• D. Drug

Explanation: Biodiversity supports ecosystem maintenance by sustaining food webs, nutrient cycling, pollination and resilience to disturbance.

• A. Species diversity
• B. Beta diversity
• C. Alpha diversity
• D. Genetic diversity

Explanation: Alpha diversity measures the species richness within one community or habitat.

• A. The most valuable and the richest ecosystems on earth
• B. They play a critical pat in the earth's life support systems and house 50% and possibly as much as 90% of all the species on earth
• C. They are a key storehouse of foods, oils and minerals and source of ingredients that make up a range of medical treatments
• D. All of the above

Explanation: Tropical rain forests are exceptionally species-rich ecosystems and perform major life-support functions such as carbon storage and…

• A. All of the above
• B. They live in highly organized colonies to a strict caste system
• C. The nests are built to provide central heating and air-conditioning
• D. Many parts of the world, but primarily in tropical rain forests

Explanation: Termites are especially abundant in tropical regions, live in colonies with specialized castes and construct nests that regulate…

• A. The study of fossil plants and animals and of the rock formations where they are found
• B. The information is used increasingly in environmental sciences to build up a picture of past environments
• C. Both (a) & (b)
• D. None of these

Explanation: Paleontology studies fossils and the geological formations containing them, allowing scientists to reconstruct earlier environments and…

• A. A dense accumulation of only partially decomposed plant materials which has formed in wetlands over a period of thousand of years
• B. It collects in still water which does not have enough oxygen to complete the total process of decay
• C. Both (a) & (b)
• D. None of these

Explanation: Peat is formed when plant material accumulates in waterlogged, oxygen-poor wetlands and decomposes only partly over long periods.

• A. The prairies of North America and the steppe of Russia and Central Asia
• B. Grassland ecosystem support thousand of different species, above and below the ground
• C. None of these
• D. Both (a) & (b)

Explanation: Grasslands include major formations such as the North American prairies and the Eurasian steppe.

• A. Both (a) & (b)
• B. The process of carbon fixation usually found in tropical plants with high growth rates
• C. A group of plants which include maize and sorghum
• D. None of these

Explanation: C4 plants, such as maize and sorghum, first fix carbon into a four-carbon compound and are common among fast-growing tropical or…

• A. An abundant family of simple mostly marine organisms
• B. The important to scientists who are studying climatic change
• C. Both (a) & (b)
• D. None of these

Explanation: Foraminifera are mostly marine, single-celled organisms with shells, and their fossil shells preserve useful evidence about past…

• A. The large coniferous forest areas in the northern hemisphere between the latitudes of 50
• B. Large areas of boreal forest are found in Scandinavia, Siberia and Northern America
• C. None of these
• D. Both (a) & (b)

Explanation: Boreal forest, or taiga, is the northern coniferous belt generally occupying high latitudes around 50°–70° N.

• A. A group of plants including the soya bean wheat and cotton
• B. The process of carbon fixation during photosynthesis
• C. The prod use a compound essential for growth that consists of molecules each containing three atoms of carbon
• D. All of the above

Explanation: C3 plants include wheat, soybean and cotton, and their photosynthetic pathway produces a first stable three-carbon compound, usually…

• A. The general description of all the flora and fauna of the planet
• B. All of the above
• C. All of which are supported by the biosphere
• D. It covers all living things from the tiniest submicroscopic organism to the elephant and giant redwood tree

Explanation: Biota means all living organisms of a region or the planet, including microscopic life, animals and plants.

• A. The north polar regions but it has also become used to denote the territory lying within the Arctic Circle
• B. The landscape, climate and plant and animal life found in those regions
• C. None of these
• D. Both (a) & (b)

Explanation: The Arctic refers both to the northern polar region, commonly defined in relation to the Arctic Circle, and to its distinctive climate…

• A. Both (a) & (b)
• B. It tends to be a regional rather than a global phenomenon linked to particular industrial activities and meteorological conditions
• C. A type of pollution which washes out of the atmosphere as dilute sulphuric and nitric acids
• D. None of these

Explanation: Acid rain is precipitation containing dilute sulphuric and nitric acids, mainly formed from industrial sulphur and nitrogen emissions.

• A. The process by which plants and animals become accustomed to unusual environmental conditions
• B. Both (a) & (b)
• C. That they are able to live and produce
• D. None of these

Explanation: Acclimatization is the adjustment of an organism to unusual environmental conditions, enabling it to survive and often grow or reproduce…

• A. An undesirable change in physical, chemical or biological characteristics of air, water or land that may
• B. Will harmfully affect human life, directly or indirectly
• C. Both (a) & (b)
• D. None of these

Explanation: Pollution is an undesirable physical, chemical, or biological change in air, water, or land that can harm living organisms and human life.

• A. To society of American forests (SAF) is an eco-system characterized by a more or less dense and extensive tree cover
• B. A plant community with predominance of trees and other woody vegetation, growing more or less closely together
• C. Both (a) & (b)
• D. None of these

Explanation: A forest can be defined ecologically as an ecosystem with substantial tree cover, or botanically as a plant community dominated by trees…

• A. Forests generally have a beneficent effect on the soil
• B. The roots of the forest trees take up nutrients from the soil, convert
• C. And utilize them for the production of plant material
• D. All of the above

Explanation: Forests influence soil beneficially, while their roots absorb mineral nutrients and use them to form plant tissue.

• A. Seashore of Karachi
• B. Plains of Punjab
• C. In the Hills of Punjab
• D. None of these

Explanation: Deodar is a montane Himalayan conifer, occurring in the higher hills of Punjab and adjoining Himalayan regions rather than in the Punjab…

• A. All of the above
• B. Transported
• C. Colluvial
• D. Alluvial
• E. Residual

Explanation: Soils are first divided by whether they form in place or are moved by water, wind, ice, or gravity.