Study specimens L, M and N carefully and use them to answer questions 4(a) to 4(c).
(a)(i) State the habitats of specimens L, M and N.
(ii) State the modes of nutrition of specimens L. M and N.
(iii) Explain how each of specimens Land M are adapted to their modes of feeding.
(b)(i) Describe briefly the relationship that exists among specimens L, M and N.
(ii) State two ways in which specimen M is of economic importance.
(iii) State one way in which specimen M can be controlled.
(c) Make a drawing 8cm – 10cm long of specimen M and label fully.
Explanation
(a)(i) Habitats:
Specimen L- Grassland/farmland/garden.
Specimen M-Farmland/garden/grassland/field.
Specimen N-Moist/damp soil/environment/decaying tree/decaying wood/pastures/meadows.
(ii) Mode of nutrition: Specimen L autotrophic/photosynthetic/holophytic.
Specimen M heterotrophic/holozoic Specimen
N- Saprophytic.
(iii) Adaptation of Specimen to their mode of feeding:
Specimen L- has green leaves/chlorophyll; for absorption of sunlight tor photosynthesis; root for absorption of water/nutrient/ minerals.
Specimen M - has mandible; for Cutting/chewing; labrum/maxilla; for cutting/chewing.
(b)(i) Relationship among Specimen L, M and N:
Specimen L/grass produces food for Specimen M grasshopper; also serves as habitat for specimen M .
Decay/decomposition of Specimen L and M serve as food substrate for Specimen N.
-The decomposition activities of Specimen N provides nutrients for Specimen L.
- Specimen L releases oxygen during photosynthesis; which is used up by Specimen M and N respiration.
- Specimen M releases carbon-dioxide during respiration, for the use of Specimen L for photosynthesis.
- The excreta of Specimen M serves as nutrient for Specimen L and N.
(ii) Economic Importance of Specimen M/grasshopper: - Serves as source of income generations
- It destroys crops/plant/reduces crop yield/reduces income.
- It is edible/- Serves as food/source of food.
(iii) Control of Specimen M/grasshopper: - Use or insecticide/pesticide.
- Introduction of biological enemies e.a birds/predators.
(e)Drawing of Specimen M:
