The bar chart above shows the data of sources of energy used for cooking in a community. Study it and answer questions 37 and 38.
The source of energy that is mostly used in the community is
- A. solar
- B. Kerosene
- C. coal
- D. wind
A farmer planted many seeds on a small piece of land. The plants that germinated are as shown above.
Which of the following effects would not be observed among the population of the plants?
- A. Rise in disease condition
- B. Death
- C. Mutualistic relationship
- D. Competition
The phenomenon by which a farmland that is left to fallow for several years develops into a forest is called
- A. Succession
- B. afforestation
- C. population
- D. colonization
An environmental problem caused by Sulphur (IV) oxide is
- A. acid rain
- B. deforestation
- C. global warming
- D. Erosion
Habitats of the organisms respectively are
- A. river and stream
- B. rainforest and stream
- C. pond and leaf litter
- D. garden and desert
The diagrams above are the illustrations of organisms from different habitat. Study them and answer questions 32 and 33.
The structures labelled I are for
- A. Camouflage
- B. Chemical offence
- C. Physical defence
- D. Mimicry
Which of the following gases is released during the decomposition of organic matter?
- A. Carbon(II) oxide
- B. Sulphur (IV) oxide
- C. Hydrogen Sulphide
- D. Nitrous oxide
Grasses → Grasshoppers → Lizards → Hawks
If the individual species of organisms in the food chain are counted and arranged as a pyramid, the result would be a pyramid of
- A. numbers
- B. energy
- C. biomass
- D. biomes
The illustration below is a food chain. Study it and answer questions 29 and 30.
Grasses → Grasshoppers → Lizards → Hawks
Which of the following statements is not correct about the food chain? The number of
- A. grasses eaten by grasshoppers is greater than the number of grasshoppers.
- B. grasses eaten by grasshoppers is fewer than the number of grasshoppers.
- C. grasshoppers eaten by lizards is greater than the number of lizards.
- D. lizards eaten by hawks is greater than the number of hawks.
The pathway through which nutrient are replenished and circulated in an ecosystem is called a
- A. cycle
- B. pyramid of energy
- C. pyramid of numbers
- D. Food chain
Discouraging the use of poison to kill fish in a large water body is a way of
- A. impoverishing the people.
- B. conserving the fish species.
- C. allowing the fittest organism to survive
- D. making the fish adapt to their environment
Sunlight is the major source of
- A. Vitamin D
- B. vitamin C
- C. vitamin B
- D. vitamin A
Which of the following food substances would give a negative reaction with Benedict’s reagent?
- A. Fructose
- B. Glucose
- C. Galactose
- D. Sucrose
The process of food digestion in mammals would
- A. make energy immediately available to the body
- B. promote growth and repair of tissues
- C. provide sufficient food materials within the body
- D. render food substances soluble and absorbable
The element required for chlorophyll formation in plants is
- A. Iron
- B. Calcium
- C. Phosphorus
- D. Sulphur
The rate of photosynthesis decreases in a wilted herbaceous plant because the
- A. enzymes in the leaf were denatured
- B. chlorophyll in the leaves was not broken down
- C. amount of light reaching the plant was reduced
- D. amount of carbon dioxide entering the leaf decrease.
Which of the following events does not occur in the light reaction stage of photosynthesis?
- A. Chlorophyll absorbs sunlight
- B. Carbon (IV) oxide combines with hydrogen
- C. Photolysis of water occurs
- D. Hydroxyl ions are produced
The Parachute-like tuft of hairs developed from the
- A. pedicel
- B. petals
- C. receptacle
- D. sepals
The diagram above illustrates a dry dehiscent fruit. Use it to answer questions 19 and 20.
The agent of dispersal of the fruit is
- A. animal
- B. explosive mechanism
- C. water
- D. wind
The condition necessary for reproduction to occur between plants P and Q after pollination is that plants P and Q should be
- A. of the same species.
- B. brightly coloured.
- C. well scented
- D. of different species.
The diagram above is an illustration of two plants P and Q. Arrows I, II and III illustrate the transfer of pollen grains among flowers of plants P and Q. Studly it and answer questions 17 and 18.
The types of pollination illustrated as I,Il and III, respectively are
- A. cross, self and cross
- B. self, self and cross
- C. self, cross and self
- D. self, cross and cross