Which of the following is the common to the mosquito, housefly and blackfly?

• A. they undergo complete metamorphosis
• B.. they are parasites of man
• C. their immature stages are aquatic
• D. their adults have two pairs of wings

An accurate identification of a rapist can be carried out by conducting a

• A. RNA analysis test
• B. DNA analysis
• C. blood group text
• D. behavioural traits

A crucible of 5 g m weighed 10 gm after filling with fresh soil. it is then heated in an oven at 100°c for 1 hour. After cooling in a desiccator, the weight was 8 gm. The percentage of water in the soil is

• A. 80%
• B. 60%
• C. 20%
• D. 40%

which of the following is true of cloning?

• A. it is welcomed as an ethical and morally sound science
• B. only one cell of the original organism is needed to initiate the process
• C. the clone is similar to but not exactly like the original organism
• D. it involves the asexual multiplication of the tissues of the original organism

The organs that will be most useful to giant African rats in finding their way in underground habitats are the

• A. vibrissae
• B. nostrils
• C. eyes
• D. tails

Which of the following used diffusion as the principal method of gaseous exchange?

• A. lizard
• B. grasshopper
• C. rat
• D. earthworm

In lizards, the lowering of the gular fold is used to?

• A. catch insects
• B. attract mates
• C. defend their territory
• D. frighten enemies

An example of a sex linked trait is the

• A. ability to grow long hair in females
• B. colour of the skin in humans
• C. ability to roll the tongue
• D. possession of facial hair in adult humans

Stunted growth and poor root development are a result of a deficiency in

• A. sulpur
• B. phosphorus
• C. calcium
• D. iron

The chromosomes of members of the kingdom Monera are within the

• A. nucleoplasm
• B. cytoplasm
• C. nucleus
• D. nucleolus