The following curve shows the distribution of the masses of the individuals in
a population of gerbils.
Number of gerbils
50 100
Mass (grams)
Which of the curves below shows the same population after directional
selection has happened?
Number of gerbils
50
100
Mass (grams)
Number of gerbils
Mass (grams)
Number of gerbis
Mass (grams)
Number of gerbils
50 100
Mass (grams)

The correct option is A.

Explanation:

In the field of ecology, directional selection can be described as a type of natural selection in which a single phenotype is abundant and favoured by natural systems, instead of the other phenotypes. As a result, phenotype frequency of the population tends to change.

The graph, A, shown the phenomenon of directional selection and the graph illustrates a single phenotype being favoured in it.

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,

chris

many phylogenetic trees have a single lineage at the base representing a common ancestor. a lineage that evolved early from the root and remains unbranched is called basal taxon. when two lineages stem from the same branch point, they are called sister taxa.

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explanation: