Use the list of insects below to answer the question below;
I. Cotton stainer II. Honeybee III. Termite IV. Weevil
Which of the insects destroys grains?
- A. I
- B. II
- C. III
- D. IV
Use the list of insects below to answer the question below;
I. Cotton stainer II. Honeybee III. Termite IV. Weevil
The insects whose activities are both beneficial and harmful to humans are;
- A. I and II
- B. II and III
- C. II and IV
- D. III and IV
The depletion of the ozone layer will result in the earth surface receiving more
- A. gamma rays
- B. infra-red rays
- C. ultraviolet rays
- D. X-rays
The position occupied by an organism in food chain is the
- A. energy level
- B. niche
- C. trophic level
- D. biomass
The diagram below is an illustration of an ecological instrument. Study it an answer the question below;
When the instrument is in use, it is usually?
- A. placed slightly above soil level
- B. placed on a table
- C. suspended in air
- D. suspended to moving water
The diagram above illustrates an ecological instrument. Study it and answer the question below;
A disadvantage of the abiotic factor measured by the instrument is that it
- A. is an agent of pollination
- B. is necessary for germination
- C. leads to flooding when in excess
- D. is used for irrigation
The table below shows the number of some organisms in habitats W and Y. Study it to answer the question below;
| Organism | Number in the habitat | |
| habitat W | habitat Y | |
| Plankton | 126 | 0 |
| Antelope | 0 | 51 |
| Water flea | 10 | 0 |
| Tilapia | 23 | 0 |
| Lion | 0 | 6 |
| Frog | 6 | 0 |
| Grass | 0 | 250 |
The number of lions and antelops in habitat Y shows that the lion
- A. is the prey while the antelope is the predator
- B. is the predator while the antelope is the prey
- C. and the antelope are preys to each other
- D. and the antelopes are predators
The table below shows the number of some organisms in habitats W and Y. Study it to answer the question below;
| Organism | Number in the habitat | |
| habitat W | habitat Y | |
| Plankton | 126 | 0 |
| Antelope | 0 | 51 |
| Water flea | 10 | 0 |
| Tilapia | 23 | 0 |
| Lion | 0 | 6 |
| Frog | 6 | 0 |
| Grass | 0 | 250 |
Which of the following statements about habitat W is correct? The
- A. absence of lions and antelopes shows that the habitat is terrestrial
- B. presence of Tilapia and planktons shows that the habitat is not aquatic
- C. type of organisms present indicate that habitat is aquatic
- D. absence of grasses indicates that the habitat is terrestrial
The table below shows the number of some organisms in habitats W and Y. Study it to answer the question below;
| Organism | Number in the habitat | |
| habitat W | habitat Y | |
| Plankton | 126 | 0 |
| Antelope | 0 | 51 |
| Water flea | 10 | 0 |
| Tilapia | 23 | 0 |
| Lion | 0 | 6 |
| Frog | 6 | 0 |
| Grass | 0 | 250 |
What type of habitat is W?
- A. Rainforest
- B. Pond
- C. Desert
- D. Ocean
The mutualism type of relationship is different from a parasitic relationship because in mutualism
- A. both organisms involved benefit
- B. none of the organisms benefits or harm each other
- C. both organisms harm each other
- D. only one of the organisms is harmed
Which of the following statements about a mixture of a protein-digesting enzyme and starch solution would be correct? The protein-digesting enzyme
- A. has no effect on the starch solution
- B. leads to the production of amino acids
- C. leads to the production of glucose
- D. digest the starch
An example of a trace elements is
- A. potassium
- B. calcium
- C. magnesium
- D. copper
The first stable product of photosynthesis is
- A. starch
- B. fructose
- C. glucose
- D. sucrose
Oxygen comes out of the stomata during photosynthesis through the process known as
- A. diffusion
- B. transpiration pull
- C. osmosis
- D. active transport
The reagent used in testing for carbon (IV) oxide is
- A. copper sulphate solution
- B. lime water
- C. hydrochloric acid
- D. sodium hydroxide solution
The diagram below is an illustration of a part of a flower. Study it and answer the question below.
The part labeled II is the
- A. unfused stigma
- B. fused style
- C. fused ovaries
- D. unfused anther
The diagram is an illustration of a part of a flower. Study it and answer the question below;
The function of the part labeled I is
- A. receiving the pollen grain
- B. attract pollinators
- C. germination of the pollen grain
- D. site for double fertilization in the plant
What happens when the ciliary muscles of the eye contract? The
- A. lens become more concave
- B. lens become more convex
- C. lens gets a longer focal length
- D. suspensory ligament becomes tight
The part of the central nervous system that controls unconscious actions in humans is the
- A. cerebellum
- B. cerebrum
- C. spinal cord
- D. optic nerves
The properties of endocrine system include the following except
- A. secretion of hormones
- B. transportation by blood to target organ
- C. having specific effect
- D. release of secretion into ducts