In what order do the following structure develop during the metamorphosis of the toad? 1. External gills 2. Internal gills 3. Forelimbs 4.Hindlimbs 5. Mouth
- A. 12345
- B. 15243
- C. 21345
- D. 53412
- E. 54321
One disease NOT caused directly by bacteria is
- A. malaria
- B. tuberculosis
- C. pneumonia
- D. tetanus
- E. cholera
Banana, plantain and pineapple can be grouped together because they
- A. produce small seeds
- B. are multiple fruit
- C. produce suckers
- D. have runners
- E. have bulbils
Plants which can survive in places where the water supply is limited are
- A. bryophytes
- B. mesophytes
- C. xerophytes
- D. hydrophytes
- E. pteridophytes
An organism having one pair of identical genes is
- A. a heterozygote
- B. a hybride
- C. an allelomorph
- D. a homozygote
- E. a diploid
A centipede differs from a millipede by its
- A. colour
- B. numerous abdominal segment
- C. paired legs on each abdominal segment
- D. poison claws
- E. cylindrical body
Which of the following diseases is NOT caused by a virus?
- A. Rinderpest
- B. Maize rust
- C. Newcastle diseases
- D. Swine fever
- E. Cassava mosaic diseases
28 g soil sample was heated to a constant weight of 24 g. When further heated to red hot and cooled, it weighed 18 g. What is the percentage of humus in the soil?
- A. 22.2
- B. 55.6
- C. 75.0
- D. 25.0
- E. 35.7
What type of fruit is formed from a single flower having several carpels?
- A. Multipe fruit
- B. Simple fruit
- C. Aggregrate fruit
- D. Dehiscent fruit
- E. Indehiscent fruit
Groundnut is not really a ‘nut’ in the biological sense because
- A. it is harvested from inside the ground
- B. pericarp is not hard and tough
- C. the fruit is not as hard as coconut
- D. the fruit is not succulent
- E. it is an achene
In the onion bulb, food is stored in the
- A. stem
- B. lateral buds
- C. cotyledons
- D. outer scale leave
- E. leaf base
The part of the mammalian brain responsible for maintaining balance is the
- A. medulla oblongata
- B. olfactory lobe
- C. cerebellum
- D. cerebrum
- E. frontal lobe
The movement of plant in response to external stimulus of no particular direction is
- A. taxism
- B. tropism
- C. hyptotropic movement
- D. nastic movement
- E. phototropism
The kidneys of all vertebrates act as osmoregulators. This means that they
- A. keep the composition of the plasma constant
- B. regulate osmotic processes
- C. control the volume of blood entering the kidneys
- D. decrease the osmotic pressure of the blood
- E. increase the osmotic pressure of blood
Which of the following substance is not found in urine?
- A. Water
- B. Sodium chloride
- C. Nitrogenous compounds
- D. Calcium chloride
- E. Nitrogenous salts
In woody plants, grass and water vapour are transported across the stems by the
- A. xylem fibres
- B. medullary rays
- C. sieve tubes
- D. phloem fibres
- E. phloem parenchyma
Which of the following statements is NOT true of mammalian erythrocytes?
- A. They have haemoglobin
- B. they appear yellow when looked at singly
- C. They are disc shaped
- D. The cell are more numerous than leucocytes
- E. They have nuclei at maturity
Which of the following elements are necessary for the formation of chlorophyll in a plant?
- A. magnesium and iron
- B. Calcium and potassium
- C. Calcium and sulphur
- D. Potasium and sulphur
- E. Phosphorus and potassium
If an organic compound has its hydrogen: oxygen ratio as 2:1, it is likely to be
- A. a protein
- B. a cabohydrate
- C. a fat
- D. a fatty acid and glycerol
- E. an amino acid
Which of the following is not associated with excretion in mammals
- A. Glomerulus
- B. Urea
- C. Faeces
- D. Carbon Dioxide
- E. Bowman's capsule
Herbs differ from shrubs because they
- A. do not produce fruit
- B. are useful to herbalist
- C. do not become woody
- D. are only annual
- E. are only perennials