(a) (i) List three characteristics of living organisms. (ii) Explain briefly the characteristics listed in (a)(i) above. (b) In a tabular form, state four d...
Question 1 Report
(a) (i) List three characteristics of living organisms.
(ii) Explain briefly the characteristics listed in (a)(i) above.
(b) In a tabular form, state four differences between plants and animals.
(c)(i) Name one organism that exhibits both plant and animal features.
(ii) State four animal features and two plant features possessed by the organism named in (c)(i) above.
Answer Details
(a)(i) Three characteristics of living organisms: nutrition, respiration, and movement (growth, reproduction, excretion, irritability/sensitivity are also valid).
(ii) Brief explanation
- Nutrition: the taking in and use of food materials for energy, growth and repair of the body.
- Respiration: the breakdown of food in cells to release energy needed for life activities.
- Movement: the ability of an organism, or parts of it, to change position or place.
(b) Four differences between plants and animals
| Plants | Animals |
|---|---|
| Manufacture their own food (autotrophic) | Feed on ready-made food (heterotrophic) |
| Possess chlorophyll | Lack chlorophyll |
| Cells have a cellulose cell wall | Cells lack a cell wall |
| Growth occurs at the tips (apical), and is usually indefinite | Growth occurs all over the body, and is usually definite |
| Cannot move from place to place (fixed) | Can move from place to place (locomotion) |
(c)(i) Organism exhibiting both plant and animal features: Euglena.
(ii) Four animal features: moves using a flagellum; has a contractile vacuole; has an eyespot (stigma) sensitive to light; lacks a cellulose cell wall (has a flexible pellicle) and can feed heterotrophically.
Two plant features: possesses chloroplasts and carries out photosynthesis; contains pyrenoids associated with food (starch) storage.
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