Natural Selection

What must a population have in order for natural selection to occur?

• variability in some characteristic
• extra DNA
• a continuous food supply
• predation pressure

What can some individuals do better than others in the presence of an environmental factor?

• Run faster
• Eat more
• Reproduce and pass on their DNA to offspring
• Survive

Any inherited trait that gives an organism an advantage in its environment is called ___.

• a mutation
• an adaptation
• evolution
• natural selection

Tags

NGSS.HS-LS4-4

Do organisms "decide" to evolve and change?

• Yes, they know they need to change to survive 
• No, they change because of natural selection

Tags

NGSS.HS-LS4-4

NGSS.HS-LS4-2

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

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

What is the source of variations within a population?

• Environmental factors
• Mutations in DNA
• Isolation
• A limited food source

How does an environmental factor act on the varied individuals within a population?

• It makes individuals change
• It kills them all
• Some individuals die, but the population doesn't change overall
• It favors some individuals over others, so the "winners" reproduce more

Why did the population of peppered moths in England change from light to dark after the Industrial Revolution?

• Light moths were easy to see against sooty trees and were eaten
• Light moths were killed by soot
• The birds that ate the dark moths were killed by soot
• Dark moths were produced by industrial processes

Which of these would be considered an adaptation of an animal that lives in the snowy tundra?

• Large webbed feet
• A thick coat of fur and blubber
• Green scales
• A diet that consists of pineapples and coconuts

Tags

NGSS.HS-LS4-4

___ are mistakes in the DNA that cause variation within a species.

• mutations
• adaptations
• speciations
• isolations

Tags

NGSS.HS-LS4-2

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