Which mechanism of evolution occurs when individuals move between populations, introducing new alleles?

A structure that has a similar function in two different species but evolved independently (like the wings of a butterfly and the wings of a bird) is called a(n):

Punctuated Equilibrium

The theory that evolutionary change occurs in quick bursts separated by long periods of stasis is known as:

Type of selection that favors individuals at both extremes of a physical trait, and can lead to the formation of two distinct groups.

Traits are randomly removed from the gene pool

Occurs during meiosis and allows for the shuffling of genes, increasing genetic variation

Reproductive Isolation

A population is prevented from interbreeding due to geography or behavior, often leading to two new species.

Observing similarities in the structures of developing vertebrate embryos to determine a common ancestor.

The process by which new species are formed.

When a lineage remains unchanged for a long period in the fossil record.

Anatomical Comparisons

Which type of evidence for evolution involves comparing the bone structures of forelimbs in mammals like humans, cats, and whales?

The total set of genes, including all alleles, that are present in a population at any one point in time

Homologous Structures

Structures that have similar arrangements, but different functions in different organisms.

Parts of an organism that no longer have a function, and can be evidence of an ancient common ancestor.

Stabilizing Selection

Individuals with intermediate values of an inherited phenotypic trait have an advantage over other individuals in the population, and the frequency of the intermediate trait increases.

Directional Selection

The frequency of alleles shift from one extreme to another because one trait is favored more than the other.

Occurs when a small group of individuals establishes a new population isolated from its original, larger population.

A change in the sequence of any segment of DNA.

A decrease in the size of a population, for at least one generation, that causes a loss of genetic variation.

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Evolution Practice

Term	Definition
Gene Flow	Which mechanism of evolution occurs when individuals move between populations, introducing new alleles?
Analogous Structure	A structure that has a similar function in two different species but evolved independently (like the wings of a butterfly and the wings of a bird) is called a(n):
Punctuated Equilibrium	The theory that evolutionary change occurs in quick bursts separated by long periods of stasis is known as:
Disruptive Selection	Type of selection that favors individuals at both extremes of a physical trait, and can lead to the formation of two distinct groups.
Genetic Drift	Traits are randomly removed from the gene pool
Recombination	Occurs during meiosis and allows for the shuffling of genes, increasing genetic variation
Reproductive Isolation	A population is prevented from interbreeding due to geography or behavior, often leading to two new species.
Embryology	Observing similarities in the structures of developing vertebrate embryos to determine a common ancestor.
Speciation	The process by which new species are formed.
Stasis	When a lineage remains unchanged for a long period in the fossil record.
Anatomical Comparisons	Which type of evidence for evolution involves comparing the bone structures of forelimbs in mammals like humans, cats, and whales?
Gene Pool	The total set of genes, including all alleles, that are present in a population at any one point in time
Homologous Structures	Structures that have similar arrangements, but different functions in different organisms.
Vestigial Structure	Parts of an organism that no longer have a function, and can be evidence of an ancient common ancestor.
Stabilizing Selection	Individuals with intermediate values of an inherited phenotypic trait have an advantage over other individuals in the population, and the frequency of the intermediate trait increases.
Directional Selection	The frequency of alleles shift from one extreme to another because one trait is favored more than the other.
Founder Effect	Occurs when a small group of individuals establishes a new population isolated from its original, larger population.
Mutation	A change in the sequence of any segment of DNA.
Bottleneck Effect	A decrease in the size of a population, for at least one generation, that causes a loss of genetic variation.

Created by: user-2033938

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