Natural Selection

Mass extinctions result in: (check all that apply)

• Destruction of all life on earth

• Speciation and Biodiversity

• Adaptive Radiation

• More competition for resources

Tags

NGSS.HS-LS2-6

NGSS.HS-LS4-5

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.

Tags

NGSS.MS-LS4-4

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

Tags

NGSS.MS-LS4-4

NGSS.MS-LS2-4

Which is not an example of an adaptation?

• A bird's beak allows it to crack open hard nuts.
• A zebra's stripes allow it to confuse its predators.
• A frog's large hind legs allow it to jump from danger.
• A cat sleeps on the sofa to avoid the vacuum cleaner.

Tags

NGSS.MS-LS4-4

The graphs show the changes in crab color at one beach.

Which of the following is most likely to have caused the change in the distribution?

• A new predator arrived that preferred dark-tan crabs.

• A change in beach color made medium-tan crabs the least visible to predators.

• A change in beach color made medium-tan crabs the most visible to predators.

Tags

NGSS.MS-LS2-4

Which of the following is NOT necessary for natural selection to occur?

• Variation in traits

• Organisms with advantages will survive and reproduce.

• A stable, unchanging environment

• Traits must be heritable

Tall kelp have a distinct advantage over shorter kelp in receiving needed sunlight in their ocean environment. Which type of natural selection would we expect?

• directional selection

• disruptive selection

• stabilizing selection

• artificial selection

Tags

NGSS.MS-LS4-4

NGSS.MS-LS4-6

According to most scientists, what is the biggest cause of most mass extinctions?

• overhunting

• evolution of new species to replace old ones

• major change in environment/habitat

• asteroid impact

Tags

NGSS.MS-LS4-1

What type of natural selection would occur if bacteria that are too large cannot obtain nutrients efficiently and bacteria that are too small cannot compete for those nutrients successfully

• directional selection

• stabilizing selection

• disruptive selection

• sexual selection

Tags

NGSS.MS-LS4-4

NGSS.MS-LS2-1

If finches with large beaks and finches with small beaks increase in a population while finches with average sized beaks decreases, which pattern of natural selection has occurred?

• Directional selection
• Disruptive selection 
• Stabilizing selection

Tags

NGSS.MS-LS4-4