biology second semester final

What word describes a trait that helps an organism survive in its environment?

• natural selection

• mutation

• camouflage

• adaptation

Why are advantageous traits more likely to be passed onto offspring?

• Because they are more likely to survive and reproduce.

• Because they come from dominant alleles.

• Because they come from recessive alleles.

• Because the organism knew it needed that trait, survives, and passes it on.

Mutations are a change in what?

• DNA

• tRNA

• protein

• rRNA

According to natural selection, light colored tree trunks would favor

• light colored moths

• dark colored moths

• red colored moths

• red and light colored moths

A variation is . . .

• when organisms have camouflage like spots or stripes

• an organism from a different dimension

• when you order different food than your friend

• differences between organisms in the same species

Bird's beaks evolve mainly due to the type of ___________________ available.

• food
• water
• shrubs
• mates

Based on feature I in the diagram, what might you expect to see if you analyzed a fossil of an ancestor of dolphins?

• evidence that the ancestor made sounds

• evidence that the ancestor had arms

• evidence that the ancestor had legs

• evidence that the ancestor had feet

Adaptations can be:

• camouflage

• ability to survive cold weather

• hunting skills

• all of the above

What is evolution?

• A process by which species of organisms arise from earlier life forms and undergo change over time.

• A theory that explains the origin of the universe
• A process by which organisms develop immunity to diseases
• A theory that explains the behavior of atoms and molecules

The giant octopus lays 20,000 to 100,000 fertilized eggs. After hatching, most octopuses become prey to larger marine organisms, and less than 5% will reach adulthood to reproduce.

One benefit of the giant octopus laying many eggs is to--

• increase the average body size for surviving individuals to avoid predation

• decrease competition between different octopus species to maintain resources in the population

• increase the chance that more individuals will survive to maintain the population

• decrease the likelihood of offspring being consumed by predators