Term
| the adaptations of organisms to their environments |
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Definition
| Natural selection drives what? |
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Term
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Definition
| ___ explains many many observations about living things |
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Term
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Definition
| similarity resulting from common ancestry |
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Term
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Definition
| ___ are anatomical similarities that show variations of a trait that were present in a common ancestor. |
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Term
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Definition
| ___ reveals anatomical homologies not visible in adult organisms |
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Term
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Definition
| ____ are some of the most intriguing homologous structures |
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Term
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Definition
| ___ are remnants of structures that served important functions in the organism’s ancestors |
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Term
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Definition
| ___ are genes that are inherited from a common ancestor |
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Term
| evolutionary tree of life |
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Definition
| The Darwinian concept of the ___ explains homologies |
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Term
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Definition
| Darwin’s observations of ___, the geographic distributions of species formed an important part of his theory |
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Term
| independently from different ancestors |
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Definition
| Some similar animals from similar environments may actually have evolved ___. |
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Term
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Definition
| The Darwinian view predicts that evolutionary transitions should leave signs in the ___. |
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Term
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Definition
| The Darwinian view predicts that ___ should leave signs in the fossil record. |
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Term
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Definition
| ___ have found fossils of many such transitional forms of evolution. |
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Term
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Definition
| Paleontologists have found ___ of transitional forms of evolution. |
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Term
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Definition
| Japanese fishers have found an unusual ___ with an extra set of fins that could be an evolutionary throwback to the time when the mammals' ancestors walked on land. |
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Term
| how new species originate |
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Definition
| Evolutionary theory must explain not only how populations evolve, but also ___ |
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Term
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Definition
| The origin of new species |
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Term
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Definition
| ___ is at the center of evolutionary theory, because the appearance of new species is the source of biological diversity |
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Term
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Definition
| Specaition is at the center of evolutionary theory, because the appearance of ___ is the source of biological diversity. |
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Term
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Definition
| ___ is evolutionary change that produces new taxa |
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Term
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Definition
| Macroevolution is evolutionary change that produces new ___ |
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Term
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Definition
| A named group of organisms |
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Term
| anagenesis and cladogenesis |
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Definition
| What are the two main patterns of evolutionary change? |
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Term
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Definition
| The type of evolutionary change that has to do with transformation |
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Term
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Definition
| The type of evolutionary patter that has to do with branching off. |
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Term
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Definition
| Each branch in an evolutionary tree is called a ___. |
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Term
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Definition
| The study of this branching process is called ___. |
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Term
| The Biological Species Concept |
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Definition
| The ___ defines a species as: a population whose members have the potential to interbreed in nature and produce fertile offspring |
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Term
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Definition
| A population whose members have the potential to interbreed in nature and produce fertile offspring |
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Term
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Definition
___ prevents members of two species from
producing viable hybrids |
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Term
| prezygotic barriers and postzygotic barriers |
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Definition
| What are the two forms of reproductive isolation? |
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Term
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Definition
| ___ impede mating or hinder fertilization if members of different species attempt to mate |
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Term
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Definition
| ___ prevent a hybrid zygote from developing into a fertile adult |
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Term
– Fossils
– Asexual organisms
– Organisms about which little is known of their reproduction |
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Definition
| The biological species concept cannot be applied to what things? |
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Term
| the morphospecies concept |
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Definition
| ___ characterizes a species in terms of its body shape, and other structures |
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Term
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Definition
| In ___ there are morphologically discrete species known only from the fossil record |
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Term
| the ecological species concept |
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Definition
| ___ views a species in terms of its ecological niche |
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Term
| the phylogenetic species concept |
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Definition
___ defines a species as a set of organisms
with a unique genetic history |
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