Major groups of plants — KCSE Biology

KCSE Biology · 70 practice questions · 3 syllabus objectives

29 easy29 medium12 hard

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Key learning outcomes for this topic, aligned to the KNEC KCSE syllabus.

Describe the distinguishing features of major plant phyla

Classify plants into major groups with examples

Major groups of plants

Sample Questions

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easySHORT ANSWER4 marks

Understanding the different processes of seed germination is crucial in the study of plant development. This knowledge helps in classifying various plant species based on their germination patterns. (a) Distinguish between epigeal germination and hypogeal germination. (2 marks) (b) Name the part of a bean seed that elongates to bring about hypogeal germination. (1 mark) (c) State one example of a plant that undergoes hypogeal germination. (1 mark)

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Part (a) — 2 marks

In epigeal germination, the cotyledons are brought above the soil surface by the elongation of the hypocotyl; (1 mk)

In hypogeal germination, the cotyledons remain below the soil surface and the epicotyl elongates to push the plumule above the ground; (1 mk)

Part (b) — 1 mark

Hypocotyl; (1 mk)

Part (c) — 1 mark

Bean/castor oil/sunflower; (1 mk)

easySHORT ANSWER4 marks

Understanding the different processes of seed germination is crucial in the study of plant development. This knowledge helps in classifying various plant species based on their germination patterns. (a) Distinguish between epigeal germination and hypogeal germination. (2 marks) (b) Name the part of a bean seed that elongates to bring about epigeal germination. (1 mark) (c) State one example of a plant that undergoes epigeal germination. (1 mark)

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Part (a) — 2 marks

In epigeal germination, the cotyledons are brought above the soil surface by the elongation of the hypocotyl; (1 mk)

In hypogeal germination, the cotyledons remain below the soil surface and the epicotyl elongates to push the plumule above the ground; (1 mk)

Part (b) — 1 mark

Epicotyl/coleoptile; (1 mk)

Part (c) — 1 mark

Bean/castor oil/sunflower; (1 mk)

easySHORT ANSWER6 marks

In the study of plant biology, understanding the reproductive structures and classifications of flowering plants is essential. This knowledge aids in recognizing the diverse adaptations and roles these plants play in ecosystems. (a) Name the part of a flower that develops into a fruit after fertilisation. (1 mark) (b) State the function of each of the following parts of a flower: (i) Stigma. (1 mark) (ii) Anther. (1 mark) (iii) Ovary. (1 mark) (c) State two differences in the floral structure of monocotyledonous and dicotyledonous plants. (two marks)

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Part (a) — 1 mark

Ovary; (1 mk)

Part (b_i) — 1 mark

Receives and holds pollen grains during pollination; (1 mk)

Part (b_ii) — 1 mark

Produces pollen grains which contain male gametes; (1 mk)

Part (b_iii) — 1 mark

Contains ovules (which develop into seeds after fertilisation); develops into the fruit; (1 mk)

Part (c) — 2 marks

Monocot flowers have floral parts in multiples of three while dicot flowers have floral parts in multiples of four or five; (1 mk)

Monocot flowers often have six tepals (undifferentiated sepals and petals) while dicot flowers have distinct sepals and petals; (1 mk)

Name two characteristics of ferns and two characteristics of flowering plants. (4 marks)

Major groups of plants — KCSE Biology

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Sample Questions

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