A one-seeded fruit in which the pericarp has fused with the seed coat is classified as
- A. a berry
- B. a caryopsis
- C. a legume
- D. an achene
If the mucus in the air track of mammals dry up and the hairs in the nostrils are removed
- A. impure air would be breathed into their lungs
- B. the speed of air movement into their lungs would increase
- C. breathing air into their lungs would be difficult
- D. more air would be taken into their lungs
Which of the following is not a component of the appendicular skeleton?
- A. Ulna
- B. Atlas
- C. Femur
- D. Pelvic girdle
Which of the following vertebrae provide articulating surfaces for the ribs?
- A. Thoracic
- B. Lumbar
- C. Cervical
- D. Sacral
Which of the following statements best describes pollination? The transfer of pollen grain from
- A. anther to stigmas
- B. stigmas to stamens
- C. the anther of a flower to the stigma of another flower of a different species
- D. anther to the ovary
The part of the ear in mammals responsible for the detection of sound is the
- A. utriculus
- B. tympanum
- C. cochlea
- D. semi-circular canal
The central nervous system in humans is made up of the
- A. brain, medulla oblongata and nerves
- B. brain, spinal cord and cranial nerves
- C. brain and spinal nerves
- D. brain and spinal cord
Which of the following conditions is responsible for the presence of sugar in the blood of diabetic patients?
- A. High intake of carbohydrates
- B. Low production of insulin
- C. Low intake of carbohydrates
- D. High production of insulin
An organism which maintains a constant temperature irrespective of environmental temperature fluctuation is
- A. an insect
- B. a mammal
- C. an amphibian
- D. a fish
Which of the following substances is not an excretory product in mammals?
- A. Carbon dioxide
- B. Water
- C. Faeces
- D. Urea
The ventricles of the mammalian heart have thicker
muscular walls than the auricles because the
- A. ventricles are larger
- B. ventricles receive more blood
- C. ventricles pump blood to longer distances
- D. auricles have smaller capacity
Which of the following organs in mammals is not excretory in function?
- A. Liver
- B. Kidney
- C. Pancreas
- D. Lungs
Gaseous exchange occurs through the following structures in some organisms except
- A. spiracle and tracheae
- B. alveoli and lungs
- C. stomata and lenticels
- D. chloroplast and plastids
Which of these factors does not contribute towards
the ascent of water in plants?
- A. Root pressure
- B. Capillarity
- C. Transpiration pull
- D. Turgor pressure
Which of the following heart structures is best adapted
to cope with double circulation?
- A. One auricle and one ventricle
- B. Two auricles and one ventricle
- C. Two auricles and partially divided ventricle
- D. Two auricles and two ventricles
Support in young herbaceous plants is provided by
- A. translocation
- B. guttation
- C. turgidity
- D. osmosis
The aspects of growth in living organisms include all
the following processes except
- A. increase in dry weight
- B. reversible increase in size
- C. irreversible increase in length
- D. increase in number of cells
Which of the following processes does not contribute
towards growth?
- A. Cell division
- B. Cell enlargement
- C. Cell differentiation
- D. Cell plasmolysis
Which of the following environmental conditions is ideal
for plant cells to remain turgid?
- A. Hot, dry weather
- B. Windy weather
- C. Cold, dry weather
- D. Cool, humid weather
During the process of osmosis a semi-permeable
membrane allows
- A. only solute molecules to pass through it
- B. both solute and solvent molecules to pass through it
- C. only solvent molecules to pass through it
- D. only gaseous molecules to pass through it
The physical process which occurs when a red blood
cell is placed in distilled water causing it to burst and
break down is known as
- A. crenation
- B. plasmolysis
- C. turgidity
- D. haemolysis