A collection of achenes formed from several carpels of a flower is
- A. a multiple fruit
- B. an aggregate fruit
- C. a shizocarp
- D. a simple fruit
The function of the epididymis in mammals is the
- A. expulsion of urine
- B. storage of sperms
- C. circulation of blood
- D. activation of sperms
Which of the following vertebrae lacks a centrum?
- A. Atlas
- B. Axis
- C. Thoracic
- D. Lumbar
The movement of the whole organism to an external stimulus is termed
- A. tropism
- B. a taxis
- C. a nastic movement
- D. a phototropic movement
Which of the following is a plant excretory product?
- A. Oil
- B. Cytokinin
- C. Resin
- D. Amino acids
Deoxygenation blood flows into the right and left lungs through the
- A. pulmonary vein
- B. vena cava
- C. pulmonary artery
- D. subclavian vein
Fibrinogen and prothrombin play important roles in the
- A. deamination of proteins
- B. clotting of blood
- C. detoxication of substance
- D. storage of vitamins
The process by which water moves from X to Y through the semi-permeable membrane is called
- A. diffusion
- B. osmosis
- C. active diffusion
- D. osmoregulation
After 30 minutes, the level of sugar solution in the above figure will?
- A. rise in x only
- B. rise in Y only
- C. be the same in X and Y
- D. fall in Y
Which of the following can bring about the greatest increase in the rate of transpiration?
- A. Increased humidity
- B. Reduced temperature
- C. Reduced wind speed
- D. Reduced humidity
In the living cells, insufficient oxygen may cause a breakdown of glucose into?
- A. fatty acids
- B. lactic acids
- C. glycogen
- D. carbon dioxide
The crown of the mammalian tooth is covered with
- A. cement
- B. dentine
- C. caries
- D. enamel
The element common to protein carbohydrate and lipid is
- A. hydrogen
- B. sulphur
- C. nitrogen
- D. phosphorus
One of the accessory organs of the digestive system is the
- A. Kidney
- B. Spleen
- C. liver
- D. lung
Which of the following is formed immediately after the first product of photosynthesis?
- A. Lipid
- B. Starch
- C. Oxygen
- D. Sugar
A wide pith with a ring of conducting tissue is characteristic of the root of
- A. sunflower
- B. maize
- C. bean
- D. okra
The gill raker of fishes take part in?
- A. feeding
- B. respiration
- C. swimming
- D. diffusion
The respiratory organ in the land snail is the
- A. radula
- B. mantle
- C. tentacle
- D. foot
The function of maxillipeds in crayfish is to aid
- A. walking
- B. swimming
- C. feeding
- D. respiration
In the earthworm, the cocoon is secreted by the
- A. chaeta
- B. prostomium
- C. peristomium
- D. citellum
One of the features which adapts Paramecium to its environment is the possession of
- A. a regular shape
- B. two nuclei
- C. cilia
- D. a pellicle