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Biology Past Questions and Answers

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Biology Questions

Question 1646:

Thyroxine and adrenalin are examples of hormones which control

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A Blood grouping
B Tongue rolling
C Behavioural patterns
D Colour variation

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Question 1647:

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

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A An allele
B Recessive
C Dominant
D A hybird

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Question 1648:

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

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A 2n â†’ 2n
B N → n
C N â†’ 2n
D 2n â†’ n

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Question 1649:

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

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A At adolescence
B At puberty
C At birth
D At conception

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Question 1650:

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

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A Presence of wings, possession of a small head and large thorax
B Presence of wings, possession of a large thorax and a small head
C Absence of wings, possession of strong mandibles and a large head
D Absence of wings,possession of big head and the absence of mandible

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