Population Ecology - Assessment

1.

Multiple Choice

1 min

1 pt

The mortality rate of organisms following a type I survivorship curve is __________.

fairly constant throughout life

higher in post-reproductive years

lower after the organisms become established

unrelated to age

2.

Multiple Choice

1 min

1 pt

Animals such as pandas are long lived, mature slowly, and generally produce fewer offspring during their life spans but place a greater investment in each. What term is applied to this type of reproductive strategy?

K-strategy

r-strategy

3.

Multiple Select

1 min

1 pt

Which contribute to a positive population growth?

immigration

positive birth rate

emigration

positive death rate

4.

Multiple Choice

1 min

1 pt

Which of the following is NOT an outcome of high population density?

mortality increase

predators tend to ignore prey that is overabundant

reduction in births

decreased resource availability

5.

Multiple Choice

1 min

1 pt

A population’s emigration in one month totaled 2 individuals. During the same period, immigration was 12 individuals. Natality (births) was 8, and mortality was 15 due to a parasite infection. What was the net effect on the population size?

+5

+3

0

-4

6.

Multiple Choice

30 sec

1 pt

What type of factor has an increasing impact as the population size increases?

density-independent

density-dependent

cohort effect

survivorship factor

7.

Multiple Select

1 min

1 pt

Which of the following are density dependent factors?

competition for resources

predation

disease

natural disasters

8.

Multiple Select

1 min

1 pt

Which of the following are examples of a density independent factors?

forest fire

seasonal cycles

storms

disease

9.

Multiple Choice

30 sec

1 pt

Factors like predation can have a positive benefit to the population of prey organisms because predators tend to keep prey populations below their ___________.

carrying capacity

sustainibility number

exponential growth point

competition level

10.

Multiple Choice

30 sec

1 pt

As a population of a species increases within a territory, which of the following most likely also increases?

Immigration

Food supply

Carrying capacity

Competition

11.

Multiple Choice

30 sec

1 pt

What type of growth model is shown in image A?

Exponential

Logistic

12.

Multiple Choice

30 sec

1 pt

What type of growth model is shown in image B?

Exponential

Logistic

13.

Multiple Choice

30 sec

1 pt

What point on the graph represents carrying capacity?

a

b

c

d

14.

Multiple Choice

30 sec

1 pt

Which choice most closely approximates the deer population's carrying capacity based on the graph?

100

80

60

10

15.

Multiple Choice

30 sec

1 pt

Which mathematical model most closely describes the population growth curve shown in deer population graph from the previous question?

logistic growth

exponential growth

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