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Bio Chapter 13 & 14
| Answer | |
|---|---|
| A(n) ______ fossil forms when an organism dies and becomes buried in sediment that packs down the organism as sedimentary rock forms. | Compression |
| Biogeography is the study of? | the distribution of species across Earth. |
| Structures are called homologous if? | the similarities between them reflect common ancestry. |
| Anatomical structures that have similar functions but that evolved independently are called ______ structures. | Analogous |
| Prior to the formation of a land bridge about 3 MYA that allowed placental mammals to invade, marsupials were diverse and abundant on what other continent besides Australia? | South America |
| If the similarities between structures of two different organisms reflect common ancestry, then the structures are? | Homologous |
| Differences and similarities in the DNA or protein of organisms is ______ evidence that can reveal evolutionary relationships. | Molecular |
| Analogous structures have similar ______ but do not have a common developmental pathway. | functions |
| When a portion of a population can no longer breed and produce fertile offspring with the rest of the population, then a ______ has formed. | new species |
| What describes the postzygotic isolating mechanism called hybrid breakdown? | Second-generation hybrid offspring are unable to reproduce. |
| The type of speciation that occurs when part of a population enters a new habitat bordering the range of the parent species is ______ speciation. | Parapatric |
| What describes the gradualism model of speciation? | small, incremental changes over many generations |
| Select all of the following that are true about adaptive radiation. | -different adaptations simultaneously selected for -rapid speciation -different types of new resources available |
| Speciations can happen in rapid bursts during a(n) ______, in which a population inhabiting a patchy or heterogeneous environment gives rise to multiple specialized forms in a relatively short time period. | coevolutionary event |
| The study of classification is called ______, which incorporates both taxonomy and phylogenetics. | systematics |
| All of the members in a clade? | Share a common ancestor |
| ______ are evolutionary trees that are used by biologists to represent hypothesized relationships among species or groups. | Phylogenies |
| A(n) ______ group of organisms contains a common ancestor and some, but not all, of its descendants. | paraphyletic |
| In phylogenetic analyses, a group of species united by a single evolutionary pathway is called a(n) | clade |
Created by:
Sydboyer15
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