Given a population that contains genetic variation, what is the correct sequence of the following events, under the influence of natural selection?

1. Well-adapted individuals leave more offspring than do poorly adapted individuals.

2. A change occurs in the environment.

3. Genetic frequencies within the population change.

4. Poorly adapted individuals have decreased survivorship.

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#Question id: 39686

#Zoology

Consider the following statements:

1. Mean is always equal to median in skewed distribution.

2. Variance is the square of standard deviation.

Choose the correct option:

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#Question id: 39687

#Zoology

Consider the following statements regarding population statistics:

1. Birth rate and death rate influence population size.

2. Immigration increases population density.

3. Emigration has no effect on population size.

   Correct option:

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#Question id: 39688

#Zoology

Assertion (A): Standard deviation gives a better idea of data variability than range.

Reason (R): Standard deviation considers deviation of each observation from the mean.

Choose the correct option:

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#Question id: 39689

#Zoology

Assertion (A): Logistic population growth is more realistic in natural ecosystems.

Reason (R): Resources in nature are unlimited.

Correct option:

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#Question id: 39690

#Zoology

 Match List-I with List-II:

List-I	List-II
A. Mean	1. Positional average
B. Median	2. Measure of dispersion
C. Standard deviation	3. Arithmetic average
D. Histogram	4. Frequency distribution

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#Question id: 39691

#Zoology

If the standard deviation of a population is zero, it indicates that: