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Chapter 7 Review

Across
When a population is not evolving it is in ....
Type of selection where either extreme is favoured
Changes in the regulation of gene expression that can be passed on to offspring
Can be formed from bones, feathers, scales or shells
Something that causes the loss of a portion of a population, such as predators
Large-scale changes that give rise to a new species
Type of selection where humans determine which organisms will reproduce
Researcher who believed traits are acquired through behaviours
The study of how organisms live in their environment
The process of changing the regulation of gene expression
Where genetic changes have to occur for evolution to occur
Down
Type of reproduction that increases genetic variation
These organisms have existed on earth for 3.5 billion years
Type of selection where one extreme is favoured
Researcher that came up with "survival of the fittest"
When antibiotics don't kill bacteria
Small changes in a population over time
Rate of evolution that occurs very slowly over time
Can be used to determine how closely related different species are
Type of selection where the intermediate phenotype is favoured
The reason for all new alleles
Type of reproduction where offspring are genetically identical to the parent