Changes in Organisms

Place these animals in order or appearance from oldest to most recent.

• A B C D

• D C B A

• D B C A

• C D B A

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

What was the "Cambrian Explosion"?

• Lots of plant and animal life suddenly appears.

• Several volcanic eruptions that caused a mass extinction.

• The enormous amount of oxygen caused by cyanobacteria.

• A type of planetary nebula.

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

When plants and animals cannot adapt to their environment, their population _____.

• survives

• gets smaller

• dies off

• gets bigger

Tags

NGSS.MS-LS2-4

If there were a wildfire and food sources were destroyed, animals would need...

• adapt to other sources of food

• nothing, they cannot survive a wildfire

• find a new environment to continue living

• cleanup the fire

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Scientists suspect that modern horses have different dietary habits than horses that lived long ago. Which of the following would be best for a scientist to do to determine whether the dietary habits of horses have changed over time?

• compare the teeth of modern horses to fossilized teeth from ancient horses

• study the overall anatomy of a modern horse

• compare the teeth of modern horses to the teeth of modern donkeys

• study the diet of modern horses

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

Responding to change helps an organism to survive. Which are a response to change in an environment? There are two correct choices.

• A cell reproduces asexually.

• You get hot and sweat.

• A cell only grows in a certain environment.

• Hummingbirds migrate to the south for the winter.

Tags

NGSS.MS-LS1-8

How tall is the plant with 10g of salt?

• 10cm

• 5cm

• 15cm

• 20cm

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

An organism that is introduced into a new ecosystem either by accident or on purpose by humans is.....

• extinct

• invasive species

• adapting

• a predator

In the following graph, the predator and prey populations change over time. What is the reason for the predator population decreasing?

• The predator eats the prey

• The prey is eaten by the predator

• The predator runs out of food when the prey population is low

• The prey survives longer when the predator population is low

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-4

Populations can change over time. For instance, if weather and climate conditions for oak trees to produce more acorns than usual then the squirrel population will _______________.

• increase

• decrease

• stay the same

• go extinct

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4