1. fossils
2.similarities in DNA and protein structures
3.similar body structures
4.patterns of early development
100
What is Darwin's hypothesis
Species change over many generations and become better adapted to new conditions
100
are there more species in larger or smaller areas
larger areas
200
How did did scientists infer the structure of ancient organisms
By looking at fossils
200
what happens in artificial selection
only organisms with a desired trait are bred
200
Which is more diverse, tropical and warm or dry and cold
tropical and warm
300
what is a similar structure that related species have inherited from a common ancestor
homologous structure
300
what is natural selection
the process by which individuals that are better adapted to their environment are more likely to survive to survive and reproduce than other members of the same species
300
name two factors that affect biodiversity
area, climate, genetic diversity,and diversity of niches
400
how can scientists tell if two species are related
1. see how similar the DNA sequences are
2. compare the order of amino acids in a protein
400
name one difference between the island iguana and mainland iquana
island iguana is black to blend in with its environment. the mainland iguana is green to blend in with the environment
400
extinction usually occurs when a species is unable to _____
Adapt
500
what is one similarity in early development that a chicken, fish, turtle, and pig have in common
a tail
500
`Darwin proposed that, over a long time, natural selection can lead to ______
Change
500
Coral reefs are often called ___ ____ _______ __ ___ ___