Evolution Recap - Chapters 7&8

You notice two species that have very similar DNA patterns. What does this likely tell you?

• They are the same species

• They have a common ancestor

• They are not likely related

• They are likely becoming one species

What do the similar embryos of humans and chickens tell us?

• We both use our bones for the same things, leading to similar structures.

• They had a common ancestor.

• They represent the same species.

• It is impossible to tell.

An adaptation is...

• how organisms change over time.

• a characteristic that helps an organism survive and reproduce in a particular environment.

• a trait that helps an organism become the strongest in the population.

• the genes in an organism that determine how an organism is going to look.

The differences among a species, like different bird beaks, are called...

• Genes

• Variations

• Advantages

• Traits

Antibiotics are frequently given to humans that have strep throat. Why might this practice be considered a problem?

• Antibiotics will have more side effects.

• The human body can metabolize the antibiotic too quickly, not allowing the antibiotic to reach the bacteria.

• A mutation can occur in the bacteria making it resistant to the antibiotic.

• Nothing will happen. It takes thousands of years for bacteria to evolve and become antibiotic-resistant.

Individuals who are considered fit, have:

• Stronger genes

• Fewer mutations

• More food

• More offspring

The relative contribution an organism makes to the next generation by producing offspring that will survive long enough to reproduce is known as....

• Adaptation

• Trait

• Fitness

• Variation

Which of the following is considered a behavioural adaptation?

• Wolves hunting in packs

• Long trunks of elephants

• Birds' wings that allow them to fly

• The white underbelly of a shark

Which of the following means "genetic change in a population over time"?

• Natural selection

• Speciation

• Evolution

• Fitness

Mutations are important because they bring about...

• death of the organism in which they develop.

• genetic variation needed for a population to evolve.

• benefits for the individual, not for the population.

• changes in genotype, but not phenotype.