Free Man and His Environment MCQs with Answers

• A. 05
• B. zero
• C. 10
• D. 15

Explanation: Natality and immigration positively contribute to the population growth while mortality and emigration are negative factors.

• A. High percentage of old individuals.
• B. Low percentage of young individuals.
• C. Stable population.
• D. High percentage of young individuals.

Explanation: An age pyramid is a graphic representation of an abundance of individuals of different age groups with pre-­reproductive individuals at…

• A. Light reaching the forest floor.
• B. Surface turbulence of water.
• C. Sediment characteristics of aquatic ecosystems.
• D. Water­holding capacity of soil.

Explanation: Benthic organisms, which are organisms that live on or near the bottom of aquatic ecosystems (such as oceans, rivers, and lakes) .Benthic…

• A. Ectoparasitism
• B. Brood parasitism
• C. Predation
• D. Endoparasitism

Explanation: Cuscuta is a total stem parasite which is a good example of ectoparasitism. It is commonly found growing on hedge plants.

• A. Vanishing population
• B. Stable population
• C. Declining population
• D. Expanding population

Explanation: An age pyramid is a graphic representation of an abundance of individuals of different age groups with pre-­reproductive individuals at…

• A. Temperate forests
• B. Mangroves
• C. Tropical rainforests
• D. Alpine forests

Explanation: Lianas are large, climbing and woody vines that drape tropical rainforest trees.

• A. The female Anopheles bites and sucks blood from humans.
• B. Human foetus developing inside the uterus draws nourishment from the mother.
• C. Head louse living on the human scalp as well as laying eggs on human hair.
• D. The cuckoo (koel) lays its eggs in crow's nest.

Explanation: Parasitism is an association in which one organism (the parasite) lives on (ectoparasitism) or in (endoparasitism) the body of another…

• A. Stratification
• B. Natality
• C. Mortality
• D. Sex-­ratio

Explanation: The characteristics of a biological community are dominance, species diversity, trophic organization, stratification, dynamism and…

• A. A host is an organism which provides food to another organism.
• B. An amensalism is a relationship in which one species is benefitted whereas the other is unaffected.
• C. A predator is an organism that catches and kills other organisms for food
• D. A parasite is an organism that always lives inside the body of another organism and may kill it.

Explanation: Predation is an interaction between members of two species in which members of one species capture, kill and eat up members of other…

• A. Scrub forests
• B. Tropical rain forests
• C. Temperate deciduous forests
• D. Alpine forests.

Explanation: Quercus is the scientific genus name for oak trees, a diverse group of hardwood trees found in various regions around the world.

• A. Population
• B. Landscape
• C. Ecosystem
• D. Biotic community

Explanation: Population has several characteristics or attributes which are a function of the whole group and not of an individual.

• A. The food plants mature and die at the end of the rainy season.
• B. Its population growth curve is of J­-type.
• C. The population of its predators increases enormously
• D. S-­shaped or sigmoid growth of this insect.

Explanation: The J-shape of growth pattern can be easily observed in algae blooms, some insects, annual plants and the lemmings of Tundra.

• A. A bi­-modal distribution
• B. A T­-shaped curve
• C. A skewed curve
• D. A normal distribution.

Explanation: When the mean and median are the same, it indicates that the data is evenly distributed around the central value.

• A. Intraspecific competition
• B. Interspecific competition
• C. Predation on one another
• D. Mutualism

Explanation: Competition is rivalry for obtaining the same resource. Competition is of two types, intraspecific and interspecific.

• A. Mutualism between two species.
• B. Active cooperation between two species.
• C. Two different parasites on the same host.
• D. Sharing of one or more resources between the two species.

Explanation: Niche/ecological niche is the specific part of a habitat occupied by individuals of a species which is circumscribed by its range of…

• A. Polar ice
• B. Glaciers and mountains
• C. Antarctica
• D. Greenland

Explanation: Nearly about 97% of the earth's water is saline in the oceans and seas. 3% of the earth's water is locked up on the polar ice caps.

• A. 22 1/2° North and South
• B. 40° North and South
• C. 42 1/2° North and South
• D. 66° North and South

Explanation: Earth does not receive equal radiation at all points. The East-West rotation of the earth provides equal exposure to sunlight but latitude…

• A. A species that makes up only a small proportion of the total biomass of a community, yet has a huge impact on the community's organization and survival.
• B. A common species that has plenty of biomass, yet has a fairly low impact on the community's organization.
• C. A rare species that has minimal impact on the biomass and on other species in the community.
• D. A dominant species that constitutes a large proportion of the biomass and which affects many other species.

Explanation: Keystone species are those species that have a significant and disproportionately large influence on the community structure and…

• A. Laterite ­- contains aluminium compound
• B. Terra rosa - most suitable for roses
• C. Chernozems - richest soil in the world
• D. black soil - rich in calcium carbonate

Explanation: Black soil forms the largest group. Black soils, also known as regosols or black clay soils, are typically not rich in calcium carbonate.

• A. Shrub land
• B. Forest
• C. Desert
• D. Grassland

Explanation: Deserts are places where the diurnal temperatures vary greatly. It is extremely hot during the day time and very cold at night.