Biology

The main distinguishing features between the soldier termite and other members of the caste are the?

A. presence of wings, possession of a small head and large thorax B. presence of wings, possession of a large…

5 years ago

At what stage in the life history of a mammal is the sex of an individual set?

A. at adolescence B. at puberty C. at birth D. at conception Correct Answer: Option D - at conception

5 years ago

The chromosome number of a cell before and after the process of meiosis is conventionally represented as?

A. 2n → 2n B. n → n C. n → 2n D. 2n → n Correct Answer: Option D…

5 years ago

A pair of genes that control a trait is referred to as?

A. an allele B. recessive C. dominant D. a hybrid Correct Answer: Option A - an allele

5 years ago

Thyroxine and adrenalin are examples of hormones which control?

A. blood grouping B. tongue rolling C. behavioural patterns D. colour variation Correct Answer: C - behavioural patterns

5 years ago

A dilute solution of phenylthiocarbamide tastes bitter to some people and is tasteless to others. This is an example of?

A. taste bud variation B. discontinuous variation C. morphological variation D. continuous variation Correct Answer: Option B - discontinuous variation

5 years ago

The protozoan Plasmodium falciparum is transmitted by?

A. female Anopheles mosquitoes B. female Aedes mosquitoes C. female Culex mosquitoes D. Female blackfly Correct Answer: Option A -…

5 years ago

The loss of soil through erosion can be reduced by?

A. watering B. crop rotation C. manuring D. irrigation Correct Answer: Option B - crop rotation

5 years ago

The vector for yellow fever is?

A. Aedes mosquito B. Anopheles mosquito C. tsetse fly D. blackfly Correct Answer: Option A - Aedes mosquito

5 years ago

The average number of individuals of a species per unit area of the habitat is the?

A. population density B. population frequency C. population size D. population distribution Correct Answer: Option A - population density

5 years ago