MacroEvolution | VOCAB Flashcards Preview

Biology Lecture Exam 1 > MacroEvolution | VOCAB > Flashcards

Flashcards in MacroEvolution | VOCAB Deck (23)
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1

Macroevolution

Evolution at a larger scale across many populations

2

Microevolution

Small changes across a population

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Speciation

Process for creating new species

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Species

A group of living organisms consisting of similar individuals capable of breeding/exchanging genes

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Species Concept

Used to define what a species is

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Morphological Concept

Characterizes a species based by body shape and other structural features

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Biological Concept

Group of organisms can potentially interbreed, or mate, with one another to produce viable fertile offspring

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Reproductive Isolation

Prevents members of different species from producing offspring

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Prezygotic Isolation Mechanism

Prevents mating and occurs before copulation

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Ecological Isolation

Species that occur in the same area, but occupy different habitats and rarely interact with each other

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Temporal Isolation

Species living in the same area that mate at different times of the day/year

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Behavioral Isolation

When signals of one species are not recognized by another

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Mechanical Isolation

Different in physical structures make mating impossible

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Gamete Isolation

When indiviuals of different species mate, but fertilization does not occur because of incompatability between the sperm and egg

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Postzygotic Isolation Mechanism

Prevents hyrbid offspring from developing/breeding

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Hyrbid Inviability

Reduces a hybrids capacity to mature into a fit, healthy adult. Cannot survivie to maturity (miscarriage)

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Hybrid Sterility

Hybrids are sterile

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Hybrid Breakdown

The second generation of hybrids reduce survival/frttility

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Speciation

Formation of a new species

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Allpatric Speciation (Variance)

When one population is geographically isolated form other populations

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Symatric Speciation

A population develops into 2 or more reproduvily isolated groups without geographic isolation

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Adaptive Radiation

When many species evolve from a single common ancestor after they are exposed to different enviroments & resoures

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Population

Any group of individuals of the same species living together in the same area