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
The removal of a man’s pancreas by surgical operation can affect only the digestion of
- A. Starch
- B. Starch, protein and fats
- C. Oils and fats
- D. Proteins
- E. Carbohydrates and fats
In the Burret test, some protein was mixed with sodium hydroxide solution. Which of the following chemicals should be added to the mixture for a positive results?
- A. Mercurous nitrates
- B. Copper sulphate
- C. Mercuric nitrate
- D. Sodium carbonate
- E. Ammonium hydroxide
A man with normal haemoglobin (AA) marries a woman who has sickle-cell haemoglobin (SS). They have a child who has a sickle-cell trait. Which of the following genotypes could be associated with the child’s haemoglobin?
- A. AA
- B. OO
- C. AO
- D. AS
- E. SS
Underground stems which grow horizontally through the soil are
- A. Bulbs
- B. Rhizomes
- C. Runners
- D. Corms
- E. Stolons
Anaerobic respiration in yeast produces
- A. Carbondioxide and ethanol
- B. Carbondioxide and water
- C. Carbondioxide and oxygen
- D. Carbondioxide and glucose
- E. Ethanol and water
Pepsin is a digestive enzymes which breaks
- A. Cellulose into glucose molecules
- B. Carbohydrates into simple sugars
- C. Protein into peptones
- D. Fats into glycerol and fatty acid
- E. Sucrose into glucose and fructose
Blood clotting is initiated by
- A. Leucocytes
- B. Platelets
- C. Haemolymph
- D. Haemoglobin
- E. Erythrocytes
Exoskeleton is NOT found in the
- A. Maggot
- B. Mosquito larva
- C. Earth worm
- D. Caterpillar
- E. Termite
The dorsal and anal fins of fish are used for
- A. Upward movement
- B. Controlling rolling
- C. Downward movement
- D. Steering
- E. Buoyancy
Which of the following statement is NOT true of enzymes? They
- A. Are proteins
- B. Need cofactors to activate them
- C. Are sensitive in their action
- D. Are specific in their action
- E. Can withstand high temperature
Osmosis can be defined as the movement of
- A. Molecules from solution of higher concentration to low concentration
- B. Molecules from solution of low concentration to high concentration
- C. Water from solution of high concentration to low concentration
- D. Water across a semi-permeable membrane from solution of low concentration to high concentration
- E. Water across a semi-permeable membrane from solution of high concentration to low concentration
The mammalian organ through which nourishment and oxygen diffuse into a developing embryo is called
- A. Amnion
- B. Chorion
- C. Umbilical cord
- D. Oviduct
- E. Placenta
A mixture of mercurous and mercuric nitrates is added to a food substance. A white precipitates is formed which on gentle heating turns red. The food substance is
- A. Protein
- B. Oil
- C. Carbohydrates
- D. Fat
- E. Fatty acid