A woman with the ability to roll her tongue (Tt) marries a man who cannot roll his tongue(tt). what is the probability of each of their children being a tongue roller?

• A. 100%
• B. 75%
• C. 50%
• D. 25%

A health condition that is known to have resulted from gene mutation is

• A. haemophilia
• B. colour blindness
• C. sickle-cell anaemia
• D. anaemia

During the dry season in the tropics, the body metabolism of some animals slows to a minimal level in a process referred to as

• A. hibernation
• B. aestivation
• C. dormancy
• D. senescense

In plants, the structures that play roles similar to the arteries and veins of animals are the

• A. xylem and phloem
• B. root hair and xylem
• C. lenticels and phloem
• D. roots and stems

Plants that grow in an area that is neither too wet nor too dry are

• A. xerophytes
• B. mesophytes
• C. epiphytes
• D. hydrophytes

A characteristics exhibited by all living organism is

• A. sexual reproduction
• B. aerobic respiration
• C. the ability to move from one place to another
• D. the ability to remove unwanted substances

Which of the following animals is most adapted for water conservation?

• A. earthworms
• B. mammals
• C. flatworms
• D. insects

The major cause of global warning is the

• A. burning of fossil fuel
• B. construction of dams
• C. use of electricity
• D. exploration of space

The enzymes of the glycolytic pathway are located in the?

• A. mitochondria
• B. gastric juice
• C. plasma
• D. cytoplasm

The part of a domestic fowl responsible for preventing heat loss is the

• A. filoplume
• B. contour feather
• C. down feather
• D. quill