Populations and Succession

The graph below shows the growth of the human population globally since 1630. Which of the following options represents the longest time period taken for the population of humans to double?

• 100 years

• 200 years

• 300 years

• 400 years

Tags

NGSS.MS-ESS3-4

The diagram shows a food chain. If the number of snakes decrease due to disease, what will happen to the number of other organisms in the food chain?

• A

• B

• C

• D

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

The graph shows how the world population of humans has increased from 1650 until the year 2000. Which stage in this sigmoidal population curve is shown by point X?

• Stationary phase

• Lag phase

• Exponential (log) phase

• Death phase

The graphs below show how the number of carnivores change over a period of time in a habitat. At point X the herbivores in the habitat are removed. Which graph correctly shows the effect of this on the number of carnivores?

• A

• B

• C

• D

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

The graph shows the change in population number of a predator and its prey. What does the dotted line represent?

• dotted line = prey population

• dotted line = predator population

• impossible to tell without more information

Tags

NGSS.MS-LS2-1

The graph shows the population size of a prey species and a predator species over a period of 30 years.

Calculate the rate (in individuals per year) at which the prey population increased over the first 4 years.

(Enter numerical value only)

Tags

NGSS.MS-LS2-1

The graph shows the population size of a prey species and a predator species over a period of 30 years.

During what time period was prey population size likely to have been most heavily influenced by intraspecific competition?

• 0 - 5 years

• 5 - 10 years

• 20 - 25 years

• 25 - 30 years

Tags

NGSS.MS-LS2-1

Which of the following is likely to experience the least change over time?

• Pioneer Species

• Primary Succession

• Secondary Succession

• Climax Community

Which of the following organisms is most likely to be a pioneer species of desert sand dunes?

• Lichen

• Moss

• Grass

• Trees

What name is given to this common pioneer organism?