Primary sex ratio is defined as
A. ratio of the two sexes at the time of ennumeration.
B. ratio of the two sexes at the time of birth.
C. ratio between the two sexes at the time of conception.
D. ratio of two sexes at the time of puberty.
Answer:C
Primary sex ratio is defined as
A. ratio of the two sexes at the time of ennumeration. B. ratio of the two sexes at the time of birth. C. ratio between the two sexes at the time of conception. D. ratio of two sexes at the time of puberty.
Explanation: Q.23. The concept that decline in the number of migrants moving long distances is the result of the increasing number of ‘intervening oppurtunities’ was propounded by