What type of relation exists between a tapeworm and an infected mammal?
- A. Symbiosis
- B. Commensalism
- C. Predation
- D. Parasitism
- E. Saprophytism
Which of the following organisms reduces nitrates in the soil to gaseous nitrogen?
- A. Euglena
- B. Protozoan
- C. Denitrifying bacterium
- D. Parasitic mould
- E. Nitrifying bacterium
Which of the following mineral salts is a trace element?
- A. Zinc
- B. Carbon
- C. Hydrogen
- D. Potassium
- E. Calcium
Which of the following is not a courtship behaviour exhibited by animals
- A. Pairing
- B. Display
- C. Seasonal migration
- D. Hibernation
- E. Territorialism
The groups of sensory cells found on the upper surface of the tongue are called
- A. ampullae
- B. taste buds
- C. nerve cells
- D. somatic cells
- E. tactile cells
When an axon is at rest, the concentration of ions on either side of the membrane are different. Which of the following is correct about the concentrations of ions on either side of the membrane?
- A. There is an excess of potassium ions inside the axon and an excess of sodium ions outside
- B. The inside of the axon becomes positively charged while the outside is negatively charged
- C. There is an excess of sodium ions on the inner side of the axon
- D. Chloride and potassium ions begin to move acrossthe membrane
- E. Calcium ions accumulate on the upper side of the axon
Which of the following is a structures functions as an excretory system found in flatworm?
- A. Contractile vacuole
- B. Nephridium
- C. Flame cell
- D. Malpighiam tubule
- E. Kidney
Ultrafiltration in the kidney takes place in the
- A. loop of Henle
- B. renal vein
- C. Bowman's capsule
- D. pelvis
- E. pyramid
Which of the following organs is associated with deamination of proteins?
- A. lung
- B. stomach
- C. kidney
- D. liver
- E. heart
The respiratory organ found in the cockroach is the
- A. air sac
- B. trachea
- C. lung book
- D. lung
- E. gill
The conditions that ensure successful exchange of gases in multicellular organisms include the following except
- A. concentration gradient across the respiratory surface
- B. presence of thin membrane as the respiratory surface
- C. last transportation of absorbed gases
- D. presence of larg surface area of the respiratory organ
- E. presence of small, dry surface area of the respiratory organ
The conditions that ensure successful exchange of gases in multicellular organisms include the following except
- A. concentration gradient across the respiratory surface
- B. presence of thin membrane as the respiratory surface
- C. last transportation of absorbed gases
- D. presence of large surface area of the respiratory organ
- E. presence of small, dry surface area of the respiratory organ
Which of the following blood vessels carries oxygenated blood into the heart?
- A. Pulmonary vein
- B. Anterior vena cava
- C. Pulmonary artery
- D. Aorta
- E. Posterior vena cava
Which of the following is the medium of transportation of nutrients with unicellular organisms?
- A. Blood
- B. Serum
- C. Protoplasm
- D. Plasma
- E. lymph
Which of the following diseases is caused by deficiency of insulin in the body?
- A. Malaria
- B. Diabetes mellitus
- C. Hepatitis
- D. Gonorrhoea
- E. Cholera
In which of the following parts of a cell is the chromosome fund?
- A. Nucleus
- B. Golgi body
- C. Cytoplasm
- D. Cell membrane
- E. Cell wall
The first scientist to describe the cell was
- A. Theodor Schwann
- B. Felix Dujardin
- C. Robert Hooke
- D. Charles Darwin
- E. Matthias Schleiden
Which of the following is a similarity between a typical animal cell and a typical plant cell?presence of
- A. cellulose cell wall
- B. chlorophyll
- C. centrally-placed nucleus
- D. cell membrane
- E. large vacuole
The organ which is sensitive to light in Euglena is the
- A. gullet
- B. chloroplast
- C. eye spot
- D. contractile vacuole
- E. flagellum