Ecology

What is the carrying capacity of the graph?

• around 500

• more than 800

• less than 300

• around 700

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When birth rate is high and death rate is low...

• population increases

• population decreases

• population stays the same

• all of these

What will happen if all of the frogs in a population die?

• The frogs' predators will decrease and the frogs' prey will increase

• The frogs' predators will increase and the frogs' prey will decrease

• We better all pray because there isn't anymore frogs.

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NGSS.MS-LS2-1

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A scientist was studying a population of fish in a pond over a period of 10 years. He observed that

the population increased each year for 3 years, and then remained nearly constant for the rest of

the study. The best explanation for this observation is that the population had

• stopped reproducing

• reached carrying capacity

• mutated into a different species

• run out of food and all died

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NGSS.MS-LS2-1

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2 factors which increase population size

• Birth Rate, Immigration
• Death Rate, Immigration
• Birth Rate, Emigration
• Death Rate, Emigration

Look at the carrying capacity graphic.

Why does the month of June have the largest seasonal carrying capacity?

• Longer summer days causes vegetation to wilt, leading to animal starvation

• An increase in humidity allows predators extra moisture for hunting

• Warm weather supplies ample food and shelter for life

• The breeding stock is not interested in mating during hot, humid days.

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NGSS.MS-LS2-1

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In population ecology, one of the factors that is studied is a density-dependent factor. Density-dependent factors have the greatest effect on dense populations and little to no effect on very sparse populations. What would NOT be an example of a density-dependent factor?

• Parasitism

• Predation

• Communicable disease

• The average rainfall of a region

Which graph depicts exponential growth in a population?

• 
• 
• 
• 

Which example describes or illustrates how a density-dependent limiting factor can affect a forest ecosystem?

• A forest fire forces many animals to move to new habitats

• A heat wave causes the death of many animals in the forest

• An earthquake causes the death of many animals in the forest

• A disease causes death of many animals in the forest

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NGSS.MS-LS2-4

One of the main causes of biodiversity loss is?

• Habitat fragmentation
• Invasive species
• Climate change
• All of the Above

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NGSS.MS-LS2-4

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