CIE Biology Paper-4: Specimen Questions 36 - 39 of 120

Passage

The figure shows a food web of grassland ecosystem.

The figure shows a food web of grassland ecosystem.

The figure shows a food web of grassland ecosystem.

The figure shows a structure of food web of grassland ecosystem.

Question number: 36 (2 of 3 Based on Passage) Show Passage

One Liner Question▾

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Give the example of primary producer in above figure

Explanation

Grass

Question number: 37 (3 of 3 Based on Passage) Show Passage

One Liner Question▾

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What will happen when the population of thrush decrease (In respect to population of slug)

Explanation

When the numbers of thrushes decreases, the number of slugs will enhance because slugs would have fewer predators.

Question number: 38

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What will be the result when a cross between a heterozygous tall pea plant and a dwarf plant occur?

Explanation

It shows how a single gene is passed on from parents to next generation.

A heterozygous tall pea plant will be Tt and Dwarf pea plant will be tt. In addition, its ratio will be 1: 1

in cross between aheterozygous tall pea plant and a dwarf plant

in cross between aheterozygous tall pea plant and a dwarf plant

Image shows cross between a heterozygous tall pea plant and a dwarf plant (1: 1)

Question number: 39

One Liner Question▾

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How acid droplets are harmful for environment?

Explanation

Acid rain is a result of air pollution. The responsible acids for acid rain are-Nitric acid and sulphuric acid. Acid droplets are harmful because-

  • The loss of fish in acid sensitive lakes and streams
  • Acid rain may remove soil nutrients such as calcium and magnesium from soils
  • Acid rain may also help weaken natural defenses of some trees, making them more vulnerable to some diseases and pests
  • Acid rain can react with aluminum in the soil. Trees cannot absorb naturally occurring aluminum, but acid rain may convert it to aluminum sulfate or aluminum nitrate. These can be absorbed by the trees, and may adversely affect them
  • Acid deposition has also caused deterioration of buildings and monuments
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