MID TERM TEST FIRST TERM SS 3 BIOLOGY

FIRST TERM EXAMINATION

Class: S.S.S 3 Subject: BIOLOGY Time:

` Answer all question in this section

A person had an accident that affected the skull but not the nose and later lost the sense of smell. The accident must have affected the (a) Nose by extension (b) Olfactory lobes of the brain (c) Passages from the nose to the brain (c) Passage from the nose to the brain (d) Part of the skull near the nose
The advantages of sexual reproduction include the following except (a) it allow the formation of new species (b) It allow production of desirable traits (c) it provides means for the variation of chromosomes number from generation to generation
Short- sight could be corrected with the use of (a) convex lens (b) Cylindrical lens (c) Concave lens (d) Bifocal lens
In which of the following processes is light energy converted to ATP (a) Osmosis (b) transpiration (c) Chemosynthesis (d) Photosynthesis
Which of the following organism is chemo-autotrophy? (a) Virus (b) Bacteria (c) Paramecium (d) Euglena
A person who fails to detect the bitter taste of a substance swallowed, is more likely to have (a) Dead taste budson the tongue (b) Avoided the substance from contacting the back of his/her tongue (c) Fewer taste buds on the tongue (d) swallowed the substance without any water
When a person moves from a darkroom into bright light, the pupil becomes (a) Red (b) Larger (c)White (d) Smaller
Sickle-cell anemia has persisted in the human race due to (a) Lack of proper medical care for sicklers (b) Carriers being more resistant to malaria (c) Mosquito vector (d) Wild life intermediate hosts
The nucleus control the activities of the cell because it (a) Synthesis hormones (b)is like a brain in the cell (c)Uses DNA to synthesize enzymes which are used in metabolism (d) send out nervous impulses to ensure the functioning of the cytoplasm
The drug which inhibit the growth of disease causing organism and thus used in the treatment of infections are referred to as (a) antibodies (b) antibiotics (c)antitoxic (d)septics
The role of ATP include all the following activities except (a)Provision of energy to do work in living organism (a) Transmission of nerve impulse (c)keeping body warm in homoeothermic animals (d)producing water during aerobic respiration
Which of the following glands secretes a substance into the blood stream of a frightened person (a) Adrenal glands (b) salivary glands (c) Gastric glands (d) Parathyroid glands
When both ovaries of the human female ovulate simultaneously and both ova are fertilized then (a) Identical twins are produced (b) Fraternal twins are produced (c) Siamese twins are produced (d) The children are produced genetically identical
Which of the following juices contains the enzymes ptyalin? (a) Gastric juice (b) Pancreatic juice (c) Succus (d) Saliva
The transfer of ripe pollen grains from the anther to the stigma of the same flower is termed (a) Fertilization (b)Self- pollination (c)Reproduction (d) Conjugation
Which of the following sensation may not be detected by the skin (a) Touch (b)Pressure (c)Stress (d)Pain
The part of the brain which control and coordinate body posture is the (a)Cerebellum (b)Hypothalamus (c)Medulla (d)Pons varolli
A man suffering from obesity must avoid meals containing (a) Margarine and butter (b) rice and beans (c)Carrots and oranges (d) Beef and fish
Which of the following parts of the eyes contain light sensitive cells (a) Choroid (b) Iris (c) Retina (d) Lens
The hair on the human skin will stand erect when the person is (a) In an air-conditioned room (b)Strolling in the sun (c) Taking a hot drink (d) Doing strenuous exercise

SECTION B

Answer any 5 questions in this section

1a. Explain briefly the process involved in perception of smell

1b.List the three ways of caring for the mammalian skin

1c. List two stimuli to which the mammalian skin is sensitive

2a. Make a diagram, 8cm-10cm long, of the male reproductive system and label fully

2b. Explain the following

Asexual reproduction
Sexual reproduction

2c. Define reproduction

3a. What is a sense organ?

3b. Describe the process that will cause a person who has been spinning to feel dizzy

3c. List two sense organs found in mammals

Make a diagram, 10cm-12cm long, of the mammalian ear. Hence, explain the mechanism of hearing
With the aid of diagram, explain kreb`s cycle.
Explain biology under the following headings
History
Branches (the major one)
List two usefulness of science
Define science