Biology Past Questions And Answers
The branch of science which deals with resemblances, origin and expression of biological variations is called
- A. embryology
- B. ecology
- C. entomology
- D. genetics
The highest level of ecological organization is the
- A. ecosystem
- B. population
- C. biosphere
- D. niche
How many gametes are produced in the pollen grain of a flowering plant before fertilization?
- A. one
- B. two
- C. three
- D. four
What organelle is the site of photosynthesis in plants?
- A. Chloroplasts
- B. Ribosomes
- C. Cytoplasm
- D. Mitochondria
Which of the following actions does not occur during exhalation in man?
- A. Thoracic cavity decreases in volume
- B. Diaphragm flattens
- C. Ribs move down and in
- D. Air pressure increases in the thoracic cavity
The beak structure of the organism is best adapted for?
- A. pecking grass
- B. killing and picking fish
- C. pecking woods
- D. sucking nectars
A characteristic feature of tropical rainforest is that it
- A. Contains trees with narrow leaves
- B. Contains large number of plant species
- C. Contains fewer number of plant species
- D. Has total annual rainfall of less than 50cm
Which of the following are components of the skeletal system in humans?
- A. Cartilage and blood vessels
- B. Ligaments and tendons
- C. Muscles and nerves
- D. Bones and joints
Which of the following structures produces the greatest variety of digestive enzymes?
- A. Salivary glands
- B. Pancreas
- C. Stomach
- D. Colon
Remoras are fish that use their sucker-like mouths to attach onto the skin of other animals. They often attach to sharks and consume dead skin cells, any food discarded from the shark, and other organisms that may feed on the shark itself. The relationship between the shark and the remora is an example of which of the following?
- A. Predation
- B. Parasitism
- C. Commensalism
- D. Competition