Quiz about Unit 1 Lesson 2

Question 1

In order to measure population density, what two factors are required?

Accepted Answer

area of the space and the number of individuals

Answer

the birth and death rates

Answer

carrying capacity and the area of the space

Answer

the perimeter of the area and the number of individuals

Question 2

Which of these changes would most likely lead to exponential growth in a population?

Accepted Answer

an increase in the amount of food available to the population

Answer

an increase in the predation on the population

Answer

a decrease in the habitat size of the population

Answer

a decrease in the amount of water available to the population

Question 3

Refer to the illustration.

During which time period is the death rate higher than the birth rate?

Accepted Answer

period D

Answer

period A

Answer

period B

Answer

period C

Question 4

A heard of Zebra's has more deaths than births and more emigration than immigration. What will most likely happen to the size of the herd long-term?

Accepted Answer

It will decrease.

Answer

It will increase.

Answer

It will stay the same.

Answer

It will increase and then decrease.

Question 5

As a population reaches its carrying capacity, resources become more scarce. Which of these would increase within the population?

Accepted Answer

competition

Answer

birthrate

Answer

nesting sites

Answer

food resources

Question 6

A scientist is using the mark-recapture technique on a population of American Alligators. She captures several individuals and marks them so they can be identified later. Then, after a period of time, she captures a second sample of the American Alligator population in the same location, and counts to see how many of them are tagged. For which purpose would the scientist most likely use this technique?

Accepted Answer

to determine the total number of individuals in the alligator population

Answer

to find out how far each alligator travels each day on average

Answer

to find out how many offspring a single alligator can have in a year

Answer

to determine the average size of an individual in the alligator population

Question 7

What is the carrying capacity of the Species 5 population?

Accepted Answer

2,000

Answer

2,500

Answer

1,500

Answer

1,000

Question 8

$$\frac{Number\ of\ individuals\left(18\right)}{Area\ \left(40\right)}=Population\ Density$$ A wildlife biologist and her team counted 18 individual Bald Eagles in an area of 40 square kilometers. What is the population density of Bald Eagles in this area?

Accepted Answer

.45 Bald Eagles/km

Answer

2.2 Bald Eagles/km

Answer

45 Bald Eagles/30 km

Answer

22 Bald Eagles/15 km

Question 9

Which of these is an example of a density-independent limiting factor?

Accepted Answer

a natural disaster

Answer

a parasite

Answer

a food shortage

Answer

a decrease in prey

Question 10

Are the change in moose numbers over time cause by a density dependent or independent factor?

Accepted Answer

density dependent

Answer

density independent

Answer

neither of these

Question 11

When would the carrying capacity of an area be most likely to change?

Accepted Answer

after a fire or flood

Answer

when resources remain the same

Answer

for all species at the same time

Answer

if emigration takes place

Question 12

$$\frac{Number\ of\ individuals\left(200\right)}{Area\ \left(10\right)}=Population\ Density$$ A wildlife biologist and her team counted 200 individual polar bear in an area of 10 square kilometers. What is the population density of deer in this area?

Accepted Answer

20 polar bears/km

Answer

200 polar bears/km

Answer

100 polar bears/5 km

Answer

200 polar bears/10 km

Question 13

Which of these is an example of a density-dependent limiting factor?

Accepted Answer

competition

Answer

a wildfire

Answer

a hurricane

Answer

drought

Question 14

Based on this graph, what is the most likely explanation for the increase in the moose population between 1989 and 1995?

Accepted Answer

a decrease in the wolf population

Answer

an increase in food resources for the moose

Answer

an increase in the wolf population

Answer

immigration of new moose into Isle Royale

Question 15

_____________________ refers to individuals exiting or leaving a population. This causes the population to decrease.

Accepted Answer

Emigration

Answer

Births

Answer

Deaths

Answer

Immigration

Question 16

$$N=\frac{M\left(80 ight) imes T\left(100 ight)}{R\left(20 ight)}$$

Accepted Answer

<html><head></head><body>400 hitch</body></html>

Answer

<html><head></head><body>800 hitch</body></html>

Answer

<html><head></head><body>80 hitch</body></html>

Answer

<html><head></head><body>100 hitch</body></html>

Question 17

Which of the following is NOT one of the four factors use to track population over time?

Accepted Answer

Competition

Answer

Births

Answer

Deaths

Answer

Emigration

Question 18

$$r=\ \left(b\left(34\right)+i\left(0\right)\right)\ -\ \left(d\left(11\right)+e\left(14\right)\right)\ $$ As part of a long-term Elephant Seal study, biologists counted individuals in a population of Elephant Seals each spring. In one year, there were 22 males and 48 females. Over the following year, each female gave birth, from which 34 offspring survived. Predators killed 11 Elephant Seals. Oil Pollution that has washed up onto the beach has caused 3 males and 11 females to Emigrate out of the study area.

Accepted Answer

Answer

Answer

Answer

Question 19

$$r=\ \left(b\left(12\right)+i\left(11\right)\right)\ -\ \left(d\left(6\right)+e\left(3\right)\right)\ $$ As part of a long-term giraffe study, biologists counted individuals in a population of giraffe's each spring. In one year, there were 12 males and 18 females. Over the following year, each female gave birth, from which 12 offspring survived. Predators killed 6 giraffe's. A wildfire burned 1,000 acres of nearby forested land, causing 3 males and 8 females to immigrate into the study area. Competition for females increased, resulting in the emigration of 3 males to a new territory in search of mates.

Accepted Answer

Answer

Answer

Answer

Question 20

_______________ dispersion may be seen in plants that drop their seeds straight to the ground, such as oak trees. It can also be seen in animals that live in groups, like a school of fish or a herd of elephants.

Accepted Answer

clumped dispe4rsion

Answer

uniform dispersion

Answer

random dispersion

Answer

competition dispersion

Unit 1 Lesson 2

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