Chapter 22- Evolution by Natural Selection

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Genetic correlation

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20 Terms

1

Genetic correlation

________ is when selection on one trait causes a change in another trait.

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2

transitional feature

A(n) ________ is a trait in a fossil species that is intermediate between those of ancestral (older) and derived (younger) species.

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3

Lamarck

________ proposed the first formal theory of evolution that species are not static but change through time.

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4

Geologic time scale

________ is a sequence of named intervals called eons, eras, and periods that represented the major events in Earth history.

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5

Sedimentary rocks

________ form from sand or mud or other materials deposited in layers at locations such as beaches or river mouths.

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6

Darwin

________ claimed that instead of being unimportant, variation among individuals in a population was the key to understanding the nature of species which is viewed as population thinking.

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7

Natural selection

________ occurs when individuals with certain heritable traits produce more surviving offspring than do individuals without those traits.

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8

Viαriαtion

________ exists among individual orgαnisms that mαke up a populαtion.

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9

Phylogenetic tree

________ is a branching diagram that depicts the ancestor- descendant relationships among species or other taxa.

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10

Acclimatization

________ is a change in an individual s phenotype that occurs in response to a change in natural environmental conditions.

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modification

Descent with ________ is the pattern component of the theory of evolution by natural selection makes two predictions about the nature of species:

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12

Biological fitness

________ is the ability of an individual to produce surviving, fertile offspring relative to that ability in other individuals in the population.

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13

Structural homology

________ is a similarity in adult morphology, or form.

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Homology

________ is a similarity that exists in species due to common ancestry.

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15

Extant species

________ refers to species that are living today.

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16

heritable trait

An adaptation is a(n) ________ that increases the fitness of an individual in a particular environment relative to individuals lacking the trait.

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17

fossil

A(n) ________ is any trace of an organism that lived in the past.

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18

vestigial trait

A(n) ________ is a reduced or incompletely developed structure that has no function, or reduced function, but is clearly similar to functioning organs or structures in ancestral or closely related species.

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19

Genetic homology

________ is similarity that occurs in DNA nucleotide sequences, RNA nucleotide sequences, or amino acid sequences.

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20

Darwin

________ distilled the process of evolution by natural selection into four simple postulates (criteria) that form a logical sequence:

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