Evolution can occur at different rates in different species. However, for evolution to occur there must be

PATTERNS OF EVOLUTION

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

A	variations within a species
B	extinction of the species
C	asexual reproduction
D	no change in the genes of an organism

Explanation:

Detailed explanation-1: -These rates vary among both genes and lineages due to gene effects (such as nucleotide composition, among-site variation, etc.), lineage effects (generation time, metabolic rates, etc.), and interactions between the two.

Detailed explanation-2: -Different genes often have different evolutionary rates. Even in a single gene, the evolutionary process is heterogeneous among sites. Rates also vary among lineages.

Detailed explanation-3: -Genetic Variation is Essential for Evolution by Natural Selection. For natural selection to occur, a population must have a wide variety of individuals with different traits.

Detailed explanation-4: -Speciation occurs when a group within a species separates from other members of its species and develops its own unique characteristics. The demands of a different environment or the characteristics of the members of the new group will differentiate the new species from their ancestors.

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