(a). Explain briefly the following terms:
(i) Renewable natural resources
(ii) Non -renewable natural resources;
(b) Give two examples each of:
(i) Renewable natural resources
(ii) Non -renewable natural resources
(c) State five ways of conserving forests
(d) State four effects of adding animal manure to garden soil.
(e) Give the possible genotypes in humans;
Explanation
(a) (i) Renewable natural resources
Materials that can be reused/replaced/ regenerated/recycled; after they have been used
(ii) Non-renewable natural resources
Materials that are difficult/impossible to regenerate/ recycled; after being exhausted/depleted.
(b) (i) Renewable natural resources
Air; soil; crops; fisheries; water; vegetation/forest; game/wildlife.
(ii) Non-Renewable natural resources Rocks; coal; minerals/correctly named example; crude oil/petroleum.
(c) Ways of conserving forest
- Prevent forest/bush fires
- Practice selective cutting of trees/avoid indiscriminate felling of trees
- Regulations/laws to control excessive clearing of forest
- Employ forest guards to prevent/arrest intruders
- Use pesticides to kill pests/control plant diseases
- Embark on public education on dangers of deforestation.
(d) Effects of adding animal manure to garden soil
- Animal manure provides nutrients/nitrogenous materials /improves soil fertility
- Animal manure are acted upon by nitrifying bacteria
- To form nitrates for plants
- Manure improves the water-holding properties of the soil by binding the soil particles together/ improves soil structure
- Prevents soil from being blown away by wind/erosion
(e) Possible genotypes in humans
AA, AS, SS