Biology Graph

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.

Tags

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.

Tags

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.

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

Tags

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

Tags

NGSS.MS-LS2-1

Relative sea urchin size (diameter in cm) in an area without sea otters (A) and an area with sea otters (B). Based on the evidence from the graph, why are sea otters considered a keystone species?

• They eat all of the small urchins to keep them from overpopulating

• They eat the medium to larger sea urchins to keep the population in balance

• They are eaten by the sea urchins for energy.

• Sea otters do not eat sea urchins.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

• The bacteria will be completely killed off if the antibiotics dosage is increased.

• The patient should have not taken the antibiotics again after day 5.

• The patient has become immune to the bacteria by day 10.

• The bacteria developed resistance to the antibiotics.

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NGSS.MS-LS2-4

NGSS.MS-LS3-1

NGSS.MS-LS4-4

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.

Tags

NGSS.MS-LS4-2

NGSS.MS-LS4-4

What is the carrying capacity of the graph?

• around 500

• more than 800

• less than 300

• around 700

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

In the energy pyramid pictured here, if the producers generate 100 units of energy, how much of that energy would be passed on to the herbivores?

• 100 units

• 50 units

• 10 units

• 1 unit

Tags

NGSS.MS-LS2-3