Question 1
State the branch of Biology that would be used in solving the problem of disputed parentage.
Answer
Genetics
Question 2
Study the diagram below and answer questions that follow
(i) What is the name given to the apparatus shown above.
(ii) What is its use in Biological studies?
Answer
(i) Pit fall trap
(ii) Trap into which small crawling animals fall and get trapped.
(ii) Trap into which small crawling animals fall and get trapped.
Question 3
a) State the role of active transport in animal nutrition.
b) Cyanide lowers the rate of active transport. Explain?
Answer
a) - Reabsorbtion of sugars and some salts in the kidney.
- Absorption of digested food from the alimentary canal into the blood stream.
- Excretion of waste products from body cells.
b) Cyanide is an enzyme inhibitor, it affects the rate of active transport.
- Absorption of digested food from the alimentary canal into the blood stream.
- Excretion of waste products from body cells.
b) Cyanide is an enzyme inhibitor, it affects the rate of active transport.
Question 4
Explain the two role of diffusion in human beings.
Answer
- Gaseous exchange.
- Absorption of substances in the kidney.
- Absorption of some food substances from the alimentary canal into the blood stream.
- Absorption of substances in the kidney.
- Absorption of some food substances from the alimentary canal into the blood stream.
Question 5
What is meant by each of the following terms?
a) Crenated cell.
b) Flaccid cell
Answer
a) An animal cell that has lost water and shrunk.
b) A plant cell that has lost water by osmosis and shrunk.
b) A plant cell that has lost water by osmosis and shrunk.