Study specimens A, B C and D carefully and use them to answer questions 1(a) to 1(d). (a)(i) Name tne phylum to which each of specimens A and D belong. (ii)...
Question 1 Report
Study specimens A, B C and D carefully and use them to answer questions 1(a) to 1(d).
(a)(i) Name tne phylum to which each of specimens A and D belong.
(ii) Name the habitat or each Specimens A and D.
(b)(i) Name the type of reproduction common to specimens A, B, C and D.
(ii) List the method of reproduction of each of specimens A, B,C and D giving one reason each for the method of reproduction listed.
(c) In a tabular form, state three observable differences between specimens B and C.
(d) Make a drawing 8-10 cm long of specimens A to show the essential parts and label fully.
Answer Details
Test of Practical Knowledge: Specimens A, B, C and D
(a)(i) Phylum
| Specimen | Phylum |
|---|---|
| A (cassava stem cutting) | Tracheophyta, also acceptable as Spermatophyta or Angiospermophyta |
| D (Spirogyra) | Thallophyta, also acceptable as Chlorophyta |
(a)(ii) Habitat
- Specimen A: terrestrial habitat, for example farmland, garden or grassland.
- Specimen D: fresh water, for example ponds, streams, puddles or ditches.
(b)(i) The type of reproduction common to specimens A, B, C and D is asexual reproduction, specifically vegetative reproduction.
(b)(ii) Methods of reproduction and reasons
| Specimen | Method | Reason |
|---|---|---|
| A, cassava | Stem cutting | It has nodes bearing axillary buds which sprout to form new plants. |
| B, plantain or banana | Suckering | Buds at the base develop into suckers. |
| C, grass | Runner or stolon | The horizontal stem has nodes which root and produce new shoots. |
| D, Spirogyra | Fragmentation | Its cells are joined end to end in a filament which can break into fragments, each capable of growth. |
(c) Observable differences between specimens B and C
| Feature | Specimen B: plantain sucker | Specimen C: grass runner |
|---|---|---|
| Direction of stem | Erect or vertical | Horizontal or creeping |
| Thickness of stem | Thick and swollen | Slender and thin |
| Internodes | Not conspicuous | Conspicuous |
(d) Drawing of specimen A, cassava stem cutting
Scale drawing length: 8-10 cm. Essential parts are fully labelled.
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