Factors Affecting Vegetation

Correct answer: A. Because climate relief water availability and human activities also affect it

Soil is important but not sufficient alone. Exam tip: understand vegetation as the result of combined factors.

Correct answer: B. Because poor drainage or thin soil can damage roots

High rainfall must be supported by suitable soil and drainage. Exam tip: consider drainage not only rainfall.

Correct answer: C. To reduce water loss

Thorns and waxy coating reduce transpiration and save water. Exam tip: treat it as an adaptation to dry climate.

Correct answer: D. Change in temperature moisture and growing period

Climate changes with altitude so plant types change. Exam tip: connect mountain vegetation with altitude.

Correct answer: A. Roots will get less support and nutrients

Soil erosion weakens roots and nutrient supply. Exam tip: study slope erosion and vegetation together.

Correct answer: B. Because water is less and the available water drains quickly

Sandy soil cannot hold water well and low rainfall reduces water availability. Exam tip: write the effect of combined factors.

Correct answer: C. They are adapted to saline marshy coastal water and soil

Mangroves are adapted to saline and waterlogged coastal areas. Exam tip: connect mangroves with coast and salinity.

Correct answer: D. Because plants will not get enough light for photosynthesis and development

Light is necessary along with nutrients for food making in plants. Exam tip: remember both sunlight and soil factors.

Correct answer: A. By reducing water loss in the dry season

Deciduous trees shed leaves in dry time to save water. Exam tip: connect seasonal rainfall with deciduous forests.

Correct answer: B. Evergreen occurs in high humidity and thorny vegetation in low rainfall

The direct answer is B: evergreen forests occur in humid, generally wetter conditions, while thorny vegetation is associated with low rainfall and dry conditions. The reasoning is: abundant rain and humidity allow plants to keep leaves and grow densely; limited rain increases water stress; plants then become sparse and may develop thorns, small leaves, or deep roots. Option A is wrong because the two vegetation types usually indicate different moisture conditions. Option B is correct, although rainfall amount, seasonality, temperature, and soil also influence vegetation. Option C is wrong because thorny vegetation is typical of dry regions, not only snowy places. Option D is wrong because evergreen forests are not confined to deserts; humid tropical and other wet regions support them. Exam cue: dense evergreen means wet; thorny means dry.

Correct answer: C. Both reduce vegetation cover and leave soil exposed

When vegetation is removed soil can be eroded easily by wind and water. Exam tip: write vegetation cover and soil protection relation.

Correct answer: D. Natural vegetation and habitats may decrease

Agricultural expansion changes land use and can reduce natural vegetation. Exam tip: remember land use and habitat relation.

Correct answer: A. Soil temperature slope and human impact may differ

Even with same rainfall other factors can change vegetation. Exam tip: consider all factors in comparison questions.

Correct answer: B. Where rainfall is low for trees but enough for grasses

In limited rainfall areas grasses may be more suitable than trees. Exam tip: connect rainfall amount with vegetation type.

Correct answer: C. Because low temperature and short growing season limit trees

Cold conditions in high mountains limit growth of large trees. Exam tip: remember the concept of tree line.

Correct answer: C. Because roads and buildings change soil drainage and green habitats

Urbanisation changes both land use and drainage. Exam tip: write multiple effects of human activity.

Correct answer: D. To conserve biodiversity habitat and ecological balance

Protected areas conserve vegetation wildlife and habitat together. Exam tip: connect conservation with biodiversity.

Correct answer: A. By changing temperature photoperiod and intensity of sun rays

Latitude affects climatic conditions and vegetation changes. Exam tip: connect latitude with climate.

Correct answer: B. There will be risk of lack of air and rot in roots

Even fertile soil cannot protect roots under poor drainage. Exam tip: consider both soil quality and drainage.

Correct answer: C. Deep soil helps roots spread and take water and nutrients

Deep soil gives plants strong support and resources. Exam tip: write the relation between roots and soil depth.

Correct answer: A. Transpiration and water conservation in soil may decrease

The direct answer is A: transpiration and water conservation in soil may decrease. Vegetation is an important part of the local water cycle. Plants take water from the soil through their roots and release some of it as water vapour through transpiration. Their roots also hold soil, and leaves and plant remains help rainwater enter and remain in the ground. Step by step: fewer plants mean fewer roots; fewer roots mean less water uptake and vapour release; less plant cover also means more quick surface runoff and less infiltration. Therefore local moisture may fall. Option A is correct because it describes these likely effects. Option B is wrong because vegetation cannot stop the Sun. Option C is wrong because loss of vegetation cannot immediately create a sea. Option D is wrong because rainfall does not become equal everywhere; rainfall depends on many atmospheric and geographical factors. Memory cue: more vegetation usually means more transpiration, infiltration and soil moisture.

Correct answer: B. Where green cover has decreased due to deforestation

The direct answer is B: where green cover has decreased because of deforestation. Afforestation means planting trees and creating forest or tree cover on land that previously had little or no forest. Step by step: deforestation removes trees; fewer trees mean less green cover, weaker soil protection, and poorer habitat; planting suitable trees can restore vegetation, reduce erosion, improve habitat, and support the water cycle; therefore afforestation is most useful in the situation described by B. Option A is wrong because afforestation is a conservation and restoration measure, not a method for increasing mining. Option B is correct because the problem and the remedy match. Option C is wrong because tree planting does not aim to increase salt in seawater. Option D is wrong because cutting all trees destroys the condition that afforestation tries to improve. Exam cue: first identify the environmental problem, then choose its matching remedy.

Correct answer: C. Because food habitat and shelter may be destroyed

Forest fire damages both vegetation and animal habitats. Exam tip: remember dependence of wildlife on vegetation.

Correct answer: D. Weak or sparse

Nutrients are necessary along with suitable temperature. Exam tip: connect climate and soil together.

Correct answer: A. Roots bind soil and reduce erosion

Roots hold soil and help protect it from erosion. Exam tip: connect roots with soil conservation.