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SCI 8 Unit 7

Evolutionary History

QuestionAnswer
What is the process by which the distribution of traits in a population changes over many generations? Natural Selection
What is a part of an organism (for example, one or more bones)? Body Structure
What is a group of organisms of the same kind (in one or more populations) that do not reproduce with organisms from any other group? Species
What is a body structure in two or more species that features the same parts (for example, the same bones)? Shared Structure
What is the process by which species adapt to environmental changes over a very long time? Evolution
What is an older population from which two or more newer species descended? Common Ancestor Population
What is a more recent species that evolved from an ancestor population? Descendant Species
What is the process by which one population evolves into two or more different species? Speciation
What is the very long time that spans the history of Earth, from the very first cellular life to the present? Evolutionary Time
Fill in the blanks: Species inherit their ____________ __________________ from their ________________ populations. 1. Body Structures 2. Ancestor
Fill in the blanks: Body ________________ that are ________________ between two species are ________________ that these two species ________________ the shared structures from a common ________________ ________________. 1. Structures 2. Shared 3. Evidence 4. Inherited 5. Ancestor Population
Fill in the blanks: In populations separated into different environments, ________________ ________________ causes different changes to happen to each population. 1. Natural Selection
Fill in the blanks: When the _____________________ is mostly the same over time, body structures stay ________________. When the environment changes over time, body structures may ________________ due to ________________ ________________. 1. Environment 2. Stable 3. Change 4. Natural Selection
Fill in the blanks: Over many ________________ and very long periods of time, many small changes can build up to large ________________ in body ________________. 1. Generations 2. Differences 3. Structures
Fill in the blanks: Among any three ________________, the two ________________ that separated most ________________ are the most ________________ related to each other. 1. Species 2. Species 3. Recently 4. Closely
Fill in the blanks: When two species share a ________________ that is not shared with a ________________ species, this can be evidence that the first two species are more closely ________________ to each other than to the third species. 1. Structure 2. Third 3. Related
Created by: lanichols54
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