IGCSE Biology Paper-2: Specimen Questions with Answers 108 - 109 of 203
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Question 108
Question
MCQ▾The diagram shows a cell seen under the light microscope.
Which labels are correct?
Choices
| Choice (4) | |
|---|---|
a. | X-cell wall, Y- tonoplast |
b. | X-cell membrane, Y- vacuole |
c. | X-cell wall, Y- cytoplasm |
d. | X-cell membrane, Y- tonoplast |
Answer
b.Explanation
Question 109
Question
MCQ▾The function of egg cell is
Choices
| Choice (4) | |
|---|---|
a. | It supplies a haploid set of chromosomes to the future embryo. |
b. | It supplies food reserves to the embryo. |
c. | It provides most of the cytoplasm to the embryo. |
d. | All a., b. and c. are correct |
Answer
d.Explanation
- Egg cells, or ova, are the cells utilized by female organisms to reproduce offspring. In contrast, the reproductive cells used by males are referred to as sperm. In mammals, a new individual is formed when an egg from the mother and a sperm from the father come together and allow their genetic material to fuse.
- Egg cells also contain many mitochondria, which supply the energy required for cell replication and division. Mitochondrial deterioration occurs with age and is thought to contribute to the difficulties experienced by many women trying to conceive children in their later years.