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Biodiversity

Total questions: 20

Worksheet time: 39mins

Name
Class
Date
1.

Biodiversity, aka biological diversity, usually refers to

a)

the same species in a general location

b)

the number of different species in a given area

c)

the number of animal species in a given area

d)

the number of plant species in a given area

2.

A population is

a)

a group of similar species in different areas

b)

a group of the same species in the same geographic area.

c)

a group of several species in the same geographic area

d)

a group of several species along with their abiotic factors in a small area.

3.
Which of the following will increase the size of a population?
a)
emigration and births
b)
immigration and deaths
c)
immigration and births
d)
emigration and deaths
4.
Which of the following is a density-dependent limiting factor?
a)
human activities 
b)
unusual weather
c)
competition
d)
natural disaster
5.
Which of the following is a density-independent limiting factor?
a)
natural disaster
b)
predation
c)
disease
d)
parasitism
6.
Diseases may spread more rapidly when an area is crowded, so disease is considered to be a
a)
type I survivorship curve
b)
population crasher
c)
density-dependent limiting factor
d)
population enhancer
7.
What type of growth is shown on this graph?
a)
logistic
b)
exponential
c)
average
d)
density-independent
8.
What type of population growth is shown in the graph?  
a)
logistic growth
b)
logical growth
c)
exponential growth
d)
density-dependent growth
9.
What 2 factors decrease population size?
a)
Immigration, Births
b)
Emigration, Births
c)
Emigration, Deaths
d)
Immigration, Deaths
10.
 What is the name for this leveling off shown in the graph?
a)
logistic line
b)
carrying capacity
c)
climax point
d)
mediocre
11.
When a population grows past the ecosystem's carrying capacity, what happens to the population?
a)
Continues to grow
b)
The population starts to die off to return to carrying capcity
c)
The population will go extinct due to lack of resources
d)
The population grows then finds a new carrying capacity
12.

When a population has reached carrying capacity

a)

Births & Immigration are equal to Death & emigration

b)

Births & Immigration are less than Death & emigration

c)

Births & Immigration are greater than Death & emigration

d)

Births are exponential

13.

Estimate the carrying capacity.

a)

100 deer

b)

80 deer

c)

60 deer

d)

40 deer

14.

What does the term carrying capacity describe?

a)

The maximum number of birth rates for a population.

b)

The ability of a population to accept new immigrants.

c)

The ratio of birth rates to death rates in a population.

d)

The population size that the environment can sustain.

15.

Identify which image below is showing a population:

a)
b)
c)
d)
16.

The lionfish is a venomous fish found primarily in the Red Sea and the Indian Ocean. In the 1990s, lionfish were accidentally released into the Atlantic Ocean, where they found abundant resources and favorable environmental conditions. Which of the following scenarios is most likely to result in the lionfish having a major impact on the communities into which they were introduced?

a)

With no natural predators, the lionfish population will become very large.

b)

Some native species of invertebrates will develop a resistance to lionfish venom.

c)

Random mating will allow the lionfish population to reach Hardy-Weinberg equilibrium.

d)

A virus that specifically infects lionfish will become more prevalent.

17.

There is strong evidence that two species of

cliff-dwelling birds have nested in the same

environment and fed in the same water for

thousands of years, with each having stable

population sizes. Based on this information,

which of the following statements is the best

conclusion?

a)

The two birds compete for food.

b)

One species will displace the other.

c)

The two birds have different ecological niches that allow coexistence.

d)

One species eats a more diverse diet than the other does.

18.

An organisms population growth is shaped by its reproductive pattern. Which combination of traits characterizes a rapid life history pattern (r-species)?

a)

short life span, produces many offspring, small body size

b)

short life span, live in more stable environments, small body size

c)

long life span, produces many offspring, grows into adults slowly

d)

long life span, large body size, grows into adults slowly

19.
This population would be characterized as which kind of species?
a)
r-selected
b)
S-selected
c)
K-selected
d)
C-selected
20.

What factor describes when populations decrease because animals are moving out of a population?

a)

Emigration

b)

Limiting Factors

c)

Immigration

d)

Exponential Growth