Checkpoint 5 Review

Which is the best example of commensalism?

• Bee and Flower

• Dog and Ticks

• Whale and Barnacle

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NGSS.MS-LS2-2

A plover bird cleans a crocodile's teeth. The bird gets to eat, while the crocodile's teeth are cleaned of debris. What type of relationship exists between the crocodile and the plover bird, according to the text?

• It is a mutualistic relationship because both animals benefit

• The crocodile is a predator. The plover is a parasite.

• It is an example of commensalism

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NGSS.MS-LS2-2

It takes a Rhino a very, very long time (18 months) for a Rhino to carry it's young and give birth. Sadly, the Rhino population is declining over time. What could be a cause of this decline?

• Rhinos are being hunted for their ivory.

• Rhinos are unable to reproduce due to human interaction

• Their population is unaffected because rhinos reproduce.

• Their population is decreasing because the slow rate of reproducing.

Tags

NGSS.MS-ESS3-4

NGSS.MS-LS2-4

Suppose the shark population in the ocean increases. What will happen to the fish population?

• It will decrease.

• It will increase.

• It will remain the same.

• It will first decrease, then increase.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

Fish and other animals that live in the ocean have become caught in plastic can loops. This is an example of how ______ can harm organisms that live in the ocean.

• chemicals

• fishing

• litter

• poisons

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NGSS.MS-ESS3-3

NGSS.MS-LS2-4

How does deforestation most directly affect bird populations in a rainforest?

• It increases the variety of available nesting sites.

• It decreases the amount of available food sources.

• It leads to a greater diversity of bird species.

• It has no significant effect on bird populations.

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NGSS.MS-LS2-1

NGSS.MS-LS2-4

What happens to the predator-prey relationship if a new, more efficient predator is introduced into an ecosystem?

• The original predator population will increase due to decreased competition for food.

• The prey population will increase as the new predator targets the original predator.

• The original predator population may decrease due to increased competition for food.

• Both predator populations will thrive due to mutualistic interactions.

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-4

Match the following types of relationships to their descriptions:

• Competition

• Both organisms are harmed by fighting over a resource

• Mutualism

• One organism benefits while the other remains neutral

• Commensalism

• One organism benefits at the expense of the other

• Parasitism

• Both organisms benefit (help each other)