Number of females per 1000 males in the population is called _______.

Birth rate.

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Death rate.

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Growth rate.

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Sex ratio.

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Solution

The correct option is D Sex ratio.
Number of females per 1000 males in the population is called sex ratio.
The sex ratio is the ratio of males to females in a population. In most sexually reproducing species, the ratio tends to be 1:1. This tendency is explained by Fisher's principle. For various reasons, however, many species deviate from anything like an even sex ratio, either periodically or permanently.

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Q. Sex ratio is defined as the number of females per 1000 males in a given population.

Question 53

Sex ratio is defined as the number of females per 1000 males in the population. Find the sex ratio, if there are 3732 females per 4000 males in a town.

Q. The birth rate is 100, the death rate is 10. The number of individuals in the population group is 1000. What is the percentage of natural growth rate?

Sex ratio is defined as the number of females per 1000 males in the population. Find the sex ratio, if there are 3732 females per 4000 males in a town.

In a given population, the proportion of males to females also called the sex ratio is usually expressed as the number of males per 10 females.

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