Biology: Evolution and Classification
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Biology: Evolution and Classification

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@BeneficiaryWashington

Questions and Answers

The most recent common ancestor of modern birds probably lived about ______ million years ago?

150

Morphological features include ______ size, wing length, and adult body weight.

bill

Monophyletic groups are any group of organisms that includes the most recent common ancestor of that group and all of its past and present ______.

descendants

A ______ group is a group of organisms derived from more than one common evolutionary ancestor or ancestral group and not suitable for being in same taxonomy.

<p>Polyphyletic</p> Signup and view all the answers

Mammals and birds were once classified as each other’s closest living vertebrate relatives, based on ______.

<p>Endothermy</p> Signup and view all the answers

Wallace’s Line separates fauna in two distinct faunal groups: ______ and Indomalayan.

<p>Australasian</p> Signup and view all the answers

The first fossil bird discovered was ______.

<p>Archaeopteryx</p> Signup and view all the answers

Powder down feathers are characterized by ______ at the tips.

<p>disintegrate</p> Signup and view all the answers

The stiff, tapered feather around a bird's head is called a ______ feather.

<p>bristle</p> Signup and view all the answers

The tiny hooklets that attach adjacent pennaceous feather branches are called ______.

<p>barbicules</p> Signup and view all the answers

The loss of genetic variation that occurs when a new population is established by a very small number of individuals is called a ______ event.

<p>founder</p> Signup and view all the answers

The points on a phylogeny where branches separate, usually representing points where an ancestral lineage splits into two or more descendant lineages, are called ______.

<p>Node</p> Signup and view all the answers

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