Normally any character shown by an organism is due to the effects of

A. hormones and chromosomes

B. chromosomes

C. mutation

D. hormones and genes

E. genes and enviroment

Which of the following statement is NOT true of symbiosis?

A. Symbionts must be living

B. It is an association of 'give and take'

C. The association may involve two plants

D. Association between two similar species

E. Symbionts derive mutual benefit

A person whose blood can be donated to all other people, must have the blood group

A. O

B. AB

C. B

D. A

E. none of the above

If Benedict's solution gives a positive result in a food test, the food contains

A. sugar

B. protein

C. oil

D. fat

E. cellulose

A surprising fact about sickle cell disease is that it

A. affects only black people

B. kills the patient

C. is hereditary

D. affects blood cells

E. weakens the patient

Nitrification means

A. conversion of nitrates to nitrogen

B. fixing nitrogen into plants

C. conversion of nitrates to nitrites

D. changing of ammonia to nitrities, then nitrates

E. nitrogen cycle

Which of the following statements is NOT true of menstruation?

A. It occurs monthly

B. The discharge contains amniotic fluid

C. Its signifies no conception

D. It involves the lining of uterus

E. It may cause pains

The tissue which connects a muscle to a bone is a

A. cartiligae

B. muscle fibre

C. tendon

D. ligament

E. connecting fibre

A fruit formed from a single flower having several free carpels is

A. a multiple fruit

B. a dry dehiscent fruit

C. a dry indehiscent fruit

D. a simple fruit

E. an aggregate fruit

If the anthers of a flower mature before the stigma, the condition is termed

A. epigyny

B. hypogyny

C. protogyny

D. protandry

E. perigyny