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Unit 4

Mr. Keene

QuestionAnswer
species must compete with one another to survive Competition
a trait that increases an organism's ability to survive and reproduce. Adaption
The process of change over time. Evolution
related species have inherited from a common ancestor. Homologous Structures
so many offspring are produced and there is not enough food, water and living space overproduction
process by which individuals that are better adapted to their environment are more likely to survive and reproduce more than other members of the same species. natural selection
any difference between individuals of the same species. variation
the preserved remains or traces of an organism that have lived in the past. fossil
any change in the DNA of a gene or a chromosome mutation
The disappearance of all members of a species from earth extinct
a group of similar organisms that can mate with each other and produce fertile offspring. species
A characteristic that an organism passes to offspring through its genes. traits
a ship that set sail from England on a 5 year trip in 1831. HMS Beagle
a well tested concept that explains a wide range of observations. scientific theory
Name the factors that affect natural selection overproduction, variation, competition, selection
how are fossils formed? remains of what is left over from a species is preserved.
give evidence for evolution fossils, patterns of early development, similar body structures
why do birds have beaks of different size and shape the beak size is based on what the bird eats.
how do new species form? they mate with each other and produce fertile offspring.
Created by: gwenrice
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