Free Forest Ecology MCQs with Answers

• A. Viviparous
• B. Heterophyllous
• C. Herbaceous
• D. Succulents

Explanation: Many desert plants are succulents, storing water in fleshy stems or leaves to survive prolonged drought.

• A. Hygroscopic water
• B. Gravitational water
• C. Hygroscopic and gravitational water
• D. Capillary water

Explanation: Capillary water is held in soil pores with enough force for roots to absorb it.

• A. Wilting coefficient
• B. Turgidity
• C. Field capacity
• D. Water retaining power of the soil

Explanation: The wilting coefficient, also called the permanent wilting point, is the soil-water percentage at which a plant remains wilted and cannot…

• A. They are absolutely devoid of xylem
• B. The supporting tissues and xylem are feebly developed
• C. They do not have stomata
• D. They totally lack phloem

Explanation: Submerged plants receive buoyant support from water, so they require little mechanical tissue; their xylem and supporting tissues…

• A. There is plenty of water in the soil
• B. The soil is muddy
• C. Light available to plant is not sufficient
• D. There is too high a concentration of salts for the plants to absorb sufficient water from the soil

Explanation: Salt-rich coastal soil lowers its water potential, making water difficult for roots to absorb even when the soil appears wet.

• A. Because of desiccation and mechanical damage to the tissues
• B. Because respiration ceases at such a low temperature
• C. Because no photosynthesis takes place at such a low temperature
• D. Because there is no transpiration

Explanation: Frost causes cellular dehydration as water freezes outside cells and can also rupture tissues through ice formation and expansion.

• A. Ficus religiosa
• B. Rhizophora mangle
• C. Mangifera indica
• D. Prosopis specigera

Explanation: Rhizophora mangle is a true mangrove, adapted to saline tidal mud with prop roots and viviparous seedlings.

• A. Epiphytes
• B. Insectivorous plants
• C. Halophytes
• D. Mesophytes

Explanation: Halophytes commonly develop mucilage and chlorenchymatous tissues as part of their succulence and salt-stress adaptations.

• A. 3,900-6,000 m
• B. 1,900-3,000 m
• C. 1,000-1,5000 m
• D. 500-1,000 m

Explanation: Alpine vegetation occupies the highest mountain belt, beginning around 3,900 m and extending toward the upper limit of plant growth.

• A. Mid-latitude forests
• B. Monsoon region
• C. Mediterranean region
• D. Coniferous forests

Explanation: Seasonal monsoon rainfall supports broad-leaved deciduous forests, whose trees shed leaves during the dry season to reduce water loss.

• A. Savanna - Acacia trees
• B. Coniferous forest - Evergreen trees
• C. Prairie - Epiphytes
• D. Tundra - Permafrost

Explanation: Prairies are open grasslands, so epiphytes are not their characteristic vegetation.

• A. Tropical dense forest is due to:
• B. Low temperature and excess rain
• C. High temperature and excess rain
• D. High temperature and lesser rain
• E. Wild animals (tigers, lions, bears etc.)

Explanation: Tropical dense forests develop where high temperatures permit year-round growth and rainfall is abundant.

• A. The size of fishes becomes large
• B. The size of fish population becomes smaller
• C. The size of fish population is in no way connected with the amount of light falling on a pond
• D. Mutation will take place in fishes

Explanation: Reduced light lowers photosynthesis by aquatic plants and algae, reducing the food and oxygen base available to fish.

• A. 6,000-9,000
• B. At 6,000
• C. Above 9,000
• D. At sea level

Explanation: Rhododendron is a high-elevation plant and is especially prominent in the upper mountain or subalpine belt, conventionally placed above…

• A. Tropical zone
• B. Gangetic plains
• C. Mangrove belt
• D. Alpine zone

Explanation: Rhododendron is associated with cool, high-elevation Himalayan vegetation and is commonly used as an indicator of the alpine or subalpine…

• A. Deep and much branched root system
• B. Feebly developed root system
• C. Well developed leaves
• D. III developed vascular system

Explanation: Xerophytes conserve water by developing deep, widely branched roots that reach scattered or deep moisture.

• A. By man only
• B. By animals only
• C. Mainly by climate
• D. By altitude of a place only

Explanation: Climate, especially temperature and precipitation, determines the broad type, density, and seasonal behaviour of vegetation in a locality.

• A. Only because of high temperature
• B. Because no seeds fall near the soil
• C. Because of several environmental factors combining together
• D. Because the soil is sandy

Explanation: Arid vegetation is sparse because limited moisture interacts with factors such as high evaporation, poor soils, salinity, and temperature…

• A. Dehradun valley
• B. Kullu valley
• C. Western ghats
• D. Sunderbans

Explanation: Mangroves are salt-tolerant trees and shrubs of tidal coastal wetlands, especially estuaries and deltas.

• A. The tropical rain forests have preponderance of angiosperms while the temperate ones have preponderance of gymnosperms
• B. The trees of temperate forests are taller than these of tropical rain forests
• C. Plants of temperate forests are comparatively more mesophytic
• D. Tropical forests are comparatively homogenous

Explanation: Tropical rain forests are dominated mainly by broad-leaved angiosperms, whereas temperate forests have a much greater representation of…