1.
Bacteria inhabiting legume root nodule and which add atmospheric nitrogen into the soil
are referred to as a. Denitrifying bacteria b. Nitrifying bacteria c. Nitrogen fixing bacteria
d. Nitrogen putrefying bacteria
2. Nitrification means a. Conversion of nitrates to nitrogen b. Fixing nitrogen into plants c.
Conversion of nitrates to nitrites d. Changing of ammonia to nitrites
3. Which of the following has the greatest influence on the distribution of animals in marine
and fresh water habitats? a. PH b. Salinity c. Water current d. Turbidity
4. One of the characteristics of plant in the savanna is the a. Possession of thin, smooth
barks b. Possession of large tap roots c. Production of seedlings on Mother plant d.
Possession of thick, flaky barks
5. Epiphytes growing on the branches of trees provide an example of the relationship
known as a. Parasitism b. Commensalism c. Aprophytism do. Holophytism
6. Which of the following causes pollution? a. Consumption of canned drinks b. The
addition of fertilizer to farmland c. Respiration of living organisms d. Burning of refuse
7. Lichen is an example of a. Saprophytic organism b. Symbiotic association c. Epiphytic
plant design. Carnivorous plants
8. A physiological adaptation of plants to the problem of excessive water loss is a.
Reduction in the number of stomata b. Reversal of the normal stomata rhythm depends.
Possession of waxy cuticle.
9. Which of the following is a dangerous product of coal burning? a. Sulphur dioxide b.
Carbon Dioxide c. Carbon d. Nitrogen
10. Which of the following constitute pollution? a. Droppings from birds b. Loud disco music
c. A park of cigarettes d. Refuse in an incinerator.
11. Which of the following is NOT an adaptive feature for arboreal life? a. Possession of long
tail b. Possession of claws c. Possession of teeth d. Counter shading in coat color.
12. An example of plant adaptation to a xerophytic environment is represented by the
development of a. Fleshy tissues and reduced leaves b. Broad canopy and extensive
surface roots system c. Thick barks and broad leaves d. Rough leaves and shallow root
system.
13. Plants adapted for life in salty marsh are called a. Hydrophytes b. Xerophytes c.
Halophytes d. Epiphytes.
14. Carbon monoxide poison tissues by a. Constricting the blood vessels b. Killing the cells
c. Combining with hemoglobin d. Rupturing the blood vessels.
15. Which is the most important pollutant of the marine environment in Nigeria? a.
Insecticides b. Sewage c. Oil d. Inorganic fertilizers.
16. A fresh water plants such as lily can solve the problem of buoyancy by the possession of
a. Parenchyma tissues b. Dissected leaves c. Thin cell walls of the epidermis d. Water
17. The Nitrifying bacteria, Nitrosomonas convert ammonia to a. Nitrites b. Nitric acid c.
Nitrates d. Nitrous oxide
18. A plant which grows on another plant without apparent harm to the host plant is called a.
A parasite b. An Epiphyte c. A Saprophyte d. A predator.
19. Plants that grow in an area that is neither too wet nor too dry are a. Xerophytes b.
Mesophytes c. Epiphytes d. Hydrophytes.
20. The plants that grow in deserts or very dry areas are referred to as a. Hydrophytes b.
Epiphytes c. Xerophytes d. Mesophytes.
THEORY.
ANSWER ANY FOUR QUESTIONS FROM THIS PART.
1a. What is habitat?
b. With two examples each, state tee three kinds of aquatic habitats.
2a. State the major zones of marine habitat.
b. Differentiate between Splash and Hadal zones.
3a. Mention two organisms in the following zones: i. Splash ii. Neritic iii. Littoral iv.
Benthic
b. Using 3 plants and 2 animals, explain adaptation in marine habitats.
4a. What are the effects of food shortage on population size?
b. List three methods of preserving food.
5a. Highlight 3 ways of improving food production.
b. Mention 4 Abiotic factors that affect food production
6a. Mention three importance of water to animals.
b. List the constituents of air in nature.
