IGCSE Biology Paper-3: Specimen Questions with Answers 264 - 267 of 358

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Passage

Many flowering plants can reproduce sexually and asexually.

Question 264 (4 of 7 Based on Passage)

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Define the term asexual reproduction.

Explanation

Asexual reproduction is a type of reproduction where fertilization does not take place as only a single parent is involved. Offspring produced is identical to the parent because they are produced as clones.

Question 265 (5 of 7 Based on Passage)

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Short Answer▾

Pollination is the transfer of pollen from the anther to the stigma. Pollen can be transferred to the stigma by being carried by the wind or by animals.

(iii) Suggest one reason why self-pollination might be advantageous to a population of plants.

Explanation

Advantages of Self-Pollination

The main advantages of self-pollination are as below:

  • A very few pollen grains can pollinate the flower.
  • Purity of the race is maintained.
  • Self-pollination avoid wastage of pollen grains.
  • Less chances of failure of pollination.

Question 266 (6 of 7 Based on Passage)

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Short Answer▾

Pollination is the transfer of pollen from the anther to the stigma. Pollen can be transferred to the stigma by being carried by the wind or by animals.

(ii) State how self-pollination differs from cross-pollination.

Explanation

Types of Pollination

Question 267 (7 of 7 Based on Passage)

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Short Answer▾

Fig. shows a potato plant, Solanum tuberosum, grown from a tuber. The tubers that potato plants are grown from are commonly referred to as seed potatoes.

Diagram of Plant

(i) Define the term growth.

Explanation

Growth

The increase in mass and increase in the number of individuals are twin characteristics of growth. The multi-cellular organisms grow by cell division. The animals grow up to a certain age, whereas the plants grow throughout their life.

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