2.1.3

Which of the following may be indicated by a low hematocrit?

• body is currently fighting infection

• low blood iron levels (anemia)

• dehydration

• blood loss

Which set of conditions is bad for overall heart health and can lead to plaque buildup in the arteries (atherosclerosis)?

• Low LDL levels and high HDL levels

• Low LDL levels and low HDL levels

• High LDL levels and low HDL levels

• High LDL levels and high HDL levels

The normal range for glucose in the blood is 65 - 99 mg/dL. A patient's blood test reveals that his blood glucose levels are 178 mg/dL. This may indicate that the patient

• is healthy, and there is nothing to be concerned about.

• is severely dehydrated.

• is going through a heart attack.

• may be at risk for diabetes.

Anemia is a condition that is characterized by

• a high platelet count.

• a high glucose count.

• a low red blood cell count.

• a low HDL count.

The graph below shows the number of birds in a population.

Which statement best explains the section X of the graph?

• Interbreeding between members of this population increased the mutation rate.

• An increase in the bird population caused an increase in the producer population.

• The population reached a state of dynamic equilibrium due to limiting factors.

• Another species came to the area and provided food for the birds.

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NGSS.MS-LS2-1

NGSS.MS-LS2-4

Non-living elements within an ecosystem are....

• Biotic

• Abiotic

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The largest number of species an ecosystem can support.

• Limiting Factor

• Carrying Capacity

• Abiotic

• Biotic

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Limiting factors which impact the size of a population no matter how large that population is.

• Density Independent Limiting Factors

• Density Dependent Limiting Factors

• Carrying Capacity

• Exponential Growth

A great white shark and an orca attempt to occupy the same niche. The more aggressive great white shark survives; the orca does not.

• Density-Dependent: Competition

• Density-Independent: Competition

• Density-Dependent: Predator-Prey

• Density-Independent: Predator-Prey

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NGSS.MS-LS2-4

Since starfish prey on marine snails, an increase in the marine snail population causes an increase in the starfish population.

• Density-Dependent: Competition

• Density-Independent: Competition

• Density-Dependent: Predator-Prey

• Density-Independent: Predator-Prey

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NGSS.MS-LS2-4