Graphing Biology

What trend and/or relationship do you see in both of these graphs?

• Larger urchins are found near Attu Island, and smaller urchin are rarely consumed near either island.

• Larger urchins are found in Amchitka, and smaller urchin are rarely consumed near either island.

• Similar sized urchins are found in both islands, and urchins are consumed evenly regardless of size.

• Similar sized urchins are found in both islands, and only small urchins are consumed.

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NGSS.MS-LS2-1

NGSS.MS-LS2-4

What do these graphs suggests in regards to which sized urchins are preferred by otters?

• Otters prefer to eat small sea urchins.

• Otters prefer to eat mid-sized to large urchins.

• Otters do not have a preference for urchin size.

• Otters refuse to eat medium sized urchins.

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NGSS.MS-LS2-1

NGSS.MS-LS2-4

This graph shows the relationship between the size of a sea urchin (diameter) and the thickness of its protective shell for two different species.

What does this graph reveal about sea urchins?

• Purple urchins have a greater thickness than red urchins.

• Red urchins have a greater thickness than purple urchins.

• Both urchins have the same thickness.

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NGSS.MS-LS2-1

What trends do you see in the graphs?

• Sea urchins are bigger in areas without sea otters.

• Sea urchins are smaller in areas without sea otters.

• The presence of sea otters does not seem to affect sea urchin size.

• Sea urchins are bigger in areas with sea otters

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NGSS.MS-LS2-1

NGSS.MS-LS2-4

An analysis of DNA and RNA sequences can be used to classify organisms. A dendrogram, such as the one shown, is based on molecular data. It can be used to represent evolutionary relationships within a group of organisms that are hypothesized to have descended from a common ancestor. Which statement is best supported by the information in this dendrogram?

• Lesser pandas are more genetically similar to giant pandas than they are to raccoons.

• Brown bears are more genetically similar to giant pandas than they are to sun bears.

• Lesser pandas are more genetically similar to raccoons than they are to giant pandas.

• The bear species are all more genetically similar to dogs than they are to giant pandas.

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NGSS.MS-LS4-2

What is the carrying capacity of the graph?

• around 500

• more than 800

• less than 300

• around 700

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NGSS.MS-LS2-1

NGSS.MS-LS2-4

How might the size of a sea urchin affect the sea otters' choice of prey?

• Otters would not prefer the larger prey, because it would take too long to eat

• Otters would prefer the larger prey, because they provide more energy.

• Otters would prefer smaller prey, because they are easier to digest

• Otters would have no preference based on size

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NGSS.MS-LS2-2

NGSS.MS-LS2-4

How might the thickness of the urchin's shell impact the otters' choice of prey?

• Otters would prefer thinner shells, because they will be easier to open.

• Otters would prefer thicker shells, because they would be harder to open.

• Otters would prefer thicker shells, because they would be easier to open

• Otters would not have a preference based on shell thickness

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NGSS.MS-LS2-4

Sea otter consumption of different species of prey in the wild.

Based on this graph which species of prey do the sea otters prefer?

• Purple urchins

• Red urchins

• Kelp

• Crabs

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NGSS.MS-LS2-1

Based on the data from the graph, how do the otters impact the two species of sea urchins?

• By eating more purple sea urchin, this population is decreased the most.

• By eating more red sea urchin, this population is decreased the most.

• By eating the same number of both species, the two populations decrease the same.

• Otters do not impact sea urchin populations.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4