ap biology population ecology

There are 200 bears in an area.  10 emigrate, 15 immigrate, 10 are born and 20 die.  How many are left?

• 195
• 205
• 200
• 260

Tags

NGSS.HS-LS2-2

A certain population of mice is growing exponentially. The growth rate of the population (r) is 2.0 and the current population size (N) is 2,500 individuals. How many mice are added to the population each year?

• 1250

• 2500

• 500

• 5000

Carrying capacity is represented by which letter?

• r
• L
• K
• c

Tags

NGSS.MS-LS2-4

Exponential growth of a population is represented by dN/dt=

• rN(K + N)

• rN^(N--_K^K)

• rN(^K_K^-N)

• r_maxN

Tags

NGSS.HS-LS2-1

NGSS.HS-LS2-2

As N approaches K for a certain population, which of the following is predicted by the logistic equation?

• The population will increase exponentially

• The growth rate will approach 0.

• The carrying capacity of the environment will increase.

• The growth rate will not change.

Tags

NGSS.HS-LS2-1

At low densities and in the absence of any other beetle species, the population of a strain of the flour beetle Tribolium castaneum grows at a per capita rate of 0.3 per week. In controlled lab conditions, the per capita growth rate is reduced by 0.015 for every 100 individuals. The addition of a related beetle, Tribolium freemani, further reduces the per

capita growth rate of T. castaneum by 0.02 for every 100 T. freemani individuals. If there are 800 T. castaneum and 500 T. freemani individuals, what is the per capita growth rate of the T. castaneum population?

• -0.22

• -0.1

• 0.08

• 0.18

• 0.52

Tags

NGSS.HS-LS2-1

NGSS.HS-LS2-2

If 50 crabs were captured and marked and then released and then a few days later 25 were caught and of those 5 were marked. What would the estimate of the population be?

• 500

• 250

• 75

• 200

A farmer wants to estimate the number of rabbits on his farm.

On Monday he catches 120 rabbits.

He puts a tag on each rabbit.

He then lets the rabbits run away.

On Tuesday the farmer catches 70 rabbits.

15 of these rabbits have a tag on them.

Work out an estimate for the total number of rabbits on the farm.

• 560

• 500

• 120

• 1000

Tags

NGSS.MS-LS2-1

Clive wants to estimate the number of bees in a beehive.

Clive catches 50 bees from the beehive.

He marks each bee with a dye.

He then lets the bees go.

The next day, Clive catches 40 bees from the beehive.

8 of these bees have been marked with the dye.

(i) Work out an estimate for the number of bees in the beehive.

• 350

• 250

• 220

• 400

There are 200 bears in an area. 10 emigrate, 15 immigrate, 10 are born and 20 die. what is the population growth rate?

• 5 bears/year

• -5 bears/year

• 15 bears/year

• -15 bears/year

Tags

NGSS.MS-LS2-1