06.4 Text C

Which field of study provides some of the strongest evidence supporting evolutionary theory today?

• Paleontology

• Genetics

• Ecology

• Meteorology

What do overwhelming similarities in the genetic code of all organisms suggest?

• Each species has a unique genetic code

• Common ancestors shared a genetic code

• Genetic codes are completely different among different kingdoms

• Genetic codes have no relation to evolution

What is one example of molecular evidence for evolution mentioned in the text?

• Differences in physical body structures

• Evolution of new species

• Nearly identical genetic code in all organisms

• Changes in climate over time

What do Hox genes determine in embryos?

• Eye color

• Limb growth

• Tail length

• Hair texture

What do small changes in Hox genes lead to in organisms?

• No visible changes

• Major changes in structure

• Changes in behavior

• Decrease in size

In the passage, what did Darwin worry about in relation to his theory?

• Lack of scientific evidence

• Lack of knowledge about heredity

• Lack of public support

• Lack of government funding

How do biologists today compare structures in different organisms?

• By looking at physical body structures

• By studying fossils

• By analyzing genes and molecules

• By observing behaviors

What do homologous Hox genes indicate about different animals?

• They share a common ancestor

• They are unrelated

• They have similar habitats

• They originated on different planets

Why didn't Darwin think it was possible to observe natural selection in nature?

• He believed evolutionary changes happen quickly

• He thought natural selection was a myth

• He thought changes were too slow to witness

• He lacked the necessary technology

What have some biologists designed experiments to study in the wild?

• Genetic mutations

• Climate change

• Natural selection

• Animal behavior