Endangered species are organisms that are?
- A. likely to migrate to other favourable lands
- B. likely to disappear from the surface of the earth
- C. reproducing profusely in an area
- D. dangerous to humans and attacking other animals
Which of the following behaviours is correctly matched with the corresponding diseases?
- A. Smoking cigarette / Liver cirrhosis. Lung cancer, AIDS
- B. Having multiple sexual partners / liver cirrhosis, syphilis, AIDS.
- C. Living near dirty gutter / Lung cancer, syphilis, river blindness.
- D. Eating uncooked meatf/fdysentery, cholera. food poisoning.
When a large number of organisms share limited resources, the result is?
- A. mutualism
- B. extinction
- C. commensalism
- D. competition
An association between living organisms in which one organism lives on and feeds at the expense of the other organism is known as?
- A. mutualism
- B. commensalism
- C. parasitism
- D. predation
Which of the following features is a characteristic of aquatic plants possession of ?
- A. multiple epidermis
- B. heavily lignified tissue
- C. finely divided leaves
- D. succulent stem
The illustration below is a food chain.
Grass→grasshopper→domestic fowl→hawk
What would happen if the population of domestic fowl decreases?
- A. grasshoppers would decrease
- B. hawks would increase
- C. grasshoppers would increase
- D. grasses available to grasshoppers
Rabbits cannot survive in an aquatic habitat because they have
- A. no scales
- B. no gills
- C. fore limbs
- D. lateral line
Plants and animals of an ecosystem make up a?
- A. habitat
- B. succession
- C. community
- D. population
The following organisms are examples of carnivorous plants except.
- A. gloriosa
- B. venus flytrap
- C. pitcher plant
- D. Utricularia
The diagram above is an illustration of the foot of an animal.
The adaptation of this type of foot is that it is?
- A. used as a bait to catch fish in water
- B. used as a paddle for swimming
- C. effective in scratching the soil for food
- D. used for killing prey in water
The process that takes place at the light stage of photosynthesis is?
- A. splitting of water molecules to form hydrogen ions
- B. reduction of carbon (IV) oxide to form carbohydrate
- C. formation of two molecules of phosphoglyceric acid
- D. breaking down of ATP molecules to produce energy
Autotrophic nutrition is a process whereby an organism obtains food
- A. by utilizing its store energy
- B. by synthesizing simple substances using energy
- C. from other organisms in exchange for some products
- D. in a synthesized form, from other living organisms
Which of the following factors is not necessary for photosynthesis?
- A. water
- B. carbon (IV) oxide
- C. wind
- D. sunlight
The diagram above is an illustration of the growth of a plant in a water culture. After a few days, the solution turned green and the plant died. Use this to answer this question.
The death of the plant was likely caused by?
- A. excess supply of nutrients to the plant
- B. inadequate supply of water to the plant
- C. algal growth in the solution that used up the nutrients
- D. inability of the plant to make food due to lack of sunlight
The diagram above is an illustration of the growth of a plant in a water culture. After a few days, the solution turned green and the plant died. Use this to answer this question.
What precaution should have been taken to prevent the solution from turning green?
- A. use a non-green plant for the experiment
- B. aerate the solution daily
- C. cover the culture vessel with opaque paper
- D. keep cotton wool around the seedling to make it dry
An enzyme reaction may begin to decline when?
- A. the optimum temperature is attained
- B. the ph of the medium is altered
- C. there is an increase in substrate concentration
- D. the atmospheric pressure is altered
Which of the following organisms does not undergo incomplete metamorphosis?
- A. locust
- B. grasshopper
- C. butterfly
- D. cockroach
How many gametes are produced in the pollen grain of a flowering plant before fertilization?
- A. one
- B. two
- C. three
- D. four
The diagram above is an illustration of a type of eye defect in humans. Study it and answer this question.
The eye defect can be corrected by the use of?
- A. convex lens
- B. concave lens
- C. bifocal lens
- D. cylindrical lens
The diagram above is an illustration of a type of eye defect in humans. Study it and answer this question.
The eye defect illustrated in the diagram is?
- A. hypermetropia
- B. astigmatism
- C. presbyopia
- D. myopia
The temperature control centre in mammals is located in the?
- A. skin
- B. hypothalamus
- C. pituitary gland
- D. adrenal gland