1 / 5

Unit 4 Concept: Evolutionary theory and natural Selection

Unit 4 Concept: Evolutionary theory and natural Selection. EQ: How do populations adapt to changing environmental Conditions?. EQ: How do populations adapt to changing environmental Conditions?. Natural Selection. Individuals in a population vary in many ways .

ulric-boyd
Download Presentation

Unit 4 Concept: Evolutionary theory and natural Selection

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Unit 4Concept: Evolutionary theory and natural Selection EQ: How do populations adapt to changing environmental Conditions?

  2. EQ: How do populations adapt to changing environmental Conditions? Natural Selection • Individuals in a population vary in many ways. • Some individuals possess features that enable them to survive better than individuals lacking those features. • More offspring are produced than can generally survive.

  3. EQ: How do populations adap to changing environmental Conditions? Fitness • The relative ability of an individual (or population) to survive, reproduce and propagate genes in an environment

  4. gene pool • EQ: How do populations adapt to changing environmental Conditions? • is the complete set of unique alleles in a species or population. • A large gene pool indicates extensive genetic diversity, which is associated with robust populations that can survive bouts of intense selection. Meanwhile, low genetic diversity (see inbreeding and population bottlenecks) can cause reduced biological fitness and an increased chance of extinction, although as explained by genetic drift new genetic variants, that may cause an increase in the fitness of organisms, are more likely to fix in the population if it is rather small.

  5. Immunity • EQ: How do populations adapt to changing environmental Conditions? • Immunity to disease that occurs as part of an individual's natural biologic makeup • This includes localbarriers to infection such as skin, stomachacid, mucous, the coughreflex, enzymes in tears and saliva and skin oils

More Related