Natural Selection and Adaptations

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

• genes.
• variations.
• traits.
• theories.

What is the advantage of having different shaped beaks?

• To look different from other species.
• To be able to eat the food readily available in the environment.
• To protect itself against predators.
• To protect itself against prey.

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 trait is an acquired phenotype.

In a population of desert plants, the timing of their blooming varies greatly. Some bloom early in the morning, others at mid-day, and others after dark. What environmental pressure might be an advantage for those plants that bloom after dark?

• There is an increase in the population of nocturnal pollinators

• There is a decrease in the strength of solar radiation

• There is an increase in herbivores that forage at night.

• There is a decrease in water for root absorption

Which of the following describes what is meant by Natural Selection?

• An organism will survive no matter what its adaptations may be

• An organism with adaptations that do not allow it to reproduce as effectively as others will survive.

• An organism with adaptations that allow it to obtain resources and reproduce more effectively than others will survive.

• No organisms will survive.

Behavioral changes of individuals of a species that allow for better survival. (Acquired traits)

• Variation
• Adaptation
• Behavior
• Environment

Why is the mouse population changing over time?

• The light mice can reproduce more successfully than the dark mice
• The hawks eat more dark mice than light mice because the dark mice taste better
• The hawks eat more light mice than dark mice because they can see the light mice more easily
• The hawks eat more dark mice than light mice because they can see the dark mice more easily

Where the better adapted organisms survive to pass traits along to offspring.

• Evolution
• Natural Selection
• Extinction
• Artifical Selection

Domesticated dogs are an example of:

• Natural Selection
• Selective Breeding

Opossums can roll onto their backs, slow their breathing, and become stiff , as if dead.

What type of ADAPTATION is this?

• Structural/physical

• Behavioral

• Physiological