Which of the following lists of diseases, their causes and transmission is CORRECT?
- A. Cholera, virus, severe diarrhoea, infected water
- B. Malaria, protozoan, high fever, contact with infected person
- C. Syphilis, virus, veneral disease, sexual intercourse
- D. small pox, virus, skin with blister, close contact with infected person
- E. Sleeping sickness, bacteria, tiredness, headache and dozing, tsetsefly bite
Which of the following groups of factors is completely abiotic?
- A. Salinity, tide, plankton, turbidity
- B. Temperaure, pH, soil, insect
- C. Wind, altitude, humidity, light
- D. Conifers, wind, pH, rainfall
- E. Soil, water, bacteria, salinity
Which of the following is NOT regarded as a pollutant on land or in the air?
- A. smoke
- B. noise
- C. sulphur (IV) oxide
- D. carbon monoxide
- E. nitrogen
An anemometer is an instrument for measuring
- A. relative humidity
- B. altitude
- C. wind speed
- D. turbidity
- E. salinity
Green plants are important in the ecosystem because they are
- A. primary consumers
- B. producers
- C. decomposers
- D. secondary consumers
- E. scavengers
Which of the following sequences represents process of blood clothing? 1. Fibrins forms a network of threads 2. Red blood cells are caught and clot is formed 3. Fibrinogen in plasma changes into fibrin 4. Blood is exposed to air
- A. 4, 3, 2, 1
- B. 4, 3, 1, 2
- C. 3, 1, 4, 2
- D. 1, 2, 3, 4
- E. 3, 1, 2, 4
The axial skeleton of a mammal does not include the bones of the
- A. skull
- B. tail
- C. limbs
- D. back
- E. neck
Heat produced in tissue respiration in plants is
- A. a chemical form of energy
- B. the only form of energy
- C. the main form of energy
- D. a useful form of energy
- E. a waste form of energy
Normally the flow of blood is NEVER from
- A. artery to arterioles
- B. arterioles to capillaries
- C. capillaries to venules
- D. arteerioles to the artery
- E. venules to the vein
The presence of a diastema in the jaw bone indicates that the mammal lacks the teeth suitable for
- A. tearing
- B. chewing
- C. cutting
- D. chewing and tearing
- E. cutting and grinding
Fehling’s solution will readily change colour from blue to reddish colour when it is
- A. mixed with sugar solution in the cold
- B. warmed or heated by itself
- C. mixed with reducing sugar in the cold
- D. warmed or heated with complex solution
- E. warmed with a solution of reducing sugar
Which of the following group does NOT reproduce asexually?
- A. Mucor, Spirogyra and Paramecium
- B. Penicillium, Paramecium and Amoeba
- C. Mucor, Rhizophus and Penicillium
- D. Amoeba, Spyrogyra and Mucor
- E. Rhizophus, Ascaris and Amoeba
The transect method can be used in ecology to show the
- A. Number of plants and animals in a habitat
- B. Population of a particular plant species
- C. Distribution of organisms along a line
- D. Heights of trees in section of a forest
- E. Number of young plants across a forest
Which of the following adaptations is NOT concerned with the flight of birds?
- A. Streamlined shape
- B. Presence of powerful muscles
- C. Reduced body weight
- D. Broad sternum
- E. Webbed feet
If an animal is very active and has good muscular control, it is likely to have well-developed
- A. Olfactory lobes
- B. Cerebral hemisphere
- C. Optic lobes
- D. Cerebellum
- E. Spinal cord
Which of the following is NOT a waste product of plants?
- A. Tannins
- B. Oxygen
- C. Carbondioxide
- D. Sap
- E. Alkaloids
How many nuclei are found in pollen tube during fertilization?
- A. 2
- B. 3
- C. 5
- D. 6
- E. 7
A flowering plant is monoecious if
- A. The androecium is found on one plant
- B. The gynoecium is monocarpous
- C. It produce essential organ
- D. The gynoecium and androecium are on the same plant
- E. The flowers are unisexual
Which of the following statements is NOT true of the piliferous layer of root? It
- A. Has a very thin cuticle
- B. Is the outermost layer of the cortex
- C. May bear root hairs
- D. Breaks down as the root ages
- E. Is replaced by cork in old roots
Which of the following types of vertebrae occur in equal numbers in the rabbit, rat and man?
- A. Caudal
- B. Thoracic
- C. Lumber
- D. Cervical
- E. Sacral
The parts used by the tapeworm to fasten itself to the host’s intestine are the
- A. Neck and suckers
- B. Hooks and suckers
- C. Rostellum and suckers
- D. Young proglottis and neck
- E. Rostellum, hooks and suckers