Quiz 3 questions

Question 1

The benthic zone of aquatic environments is defined as the:
Region that receives abundant sunlight
Region where phytoplankton are found
Region that receives no light
Substrate at the bottom of a body of water
Region that is flooded at high tide and not covered by water at low tide

Answer 1

Substrate at the bottom of a body of water

Question 2

During the year the are 80 births in a population of 500 individuals. How would you calculate the annual per capita birth rate?
80 divided by 500 = 0.16
500 divided by 80 = 6.25
80 multiplied by 500 = 40,000
80 divided by 2 = 40
The annual per capita birth rate can not be determined from the information provided

Answer 2

80 divided by 500 = 0.16

Question 3

In the logistics equation dN/dT = rN, r is a measure of the population’s intrinsic rate of increase. It is determined by:
Birth rate and death rate
Dispersion
Density
Carrying capacity
Life history

Answer 3

Birth rate and death rate

Question 4

In the life history pattern for a species includes many reproductive episodes, that species exhibits:
Iteroparity
Semelparity
Density-dependent reproduction
Dopersion

Answer 4

Iteroparity

Question 5

r strategists tend to have:
Few offspring
Little parental care
Sigmoid growth curves
Many competitors for resource

Answer 5

Little parental care

Question 6

Big bang reproduction like that involving the agave plant is an example of:
Semelparity
Iteoparity
Exponential growth
Logistic growth
K-selection

Answer 6

Semelparity

Question 7

What is the fundamental difference between matter and energy in an ecosystem?
Matter is cycles through ecosystems; energy is not
Energy is cycles through ecosystems; matter is not
Matter is used in ecosystems; energy is not
Matter can not be created or destroyed; energy can

Answer 7

Matter is cycles through ecosystems; energy is not

Question 8

Plants cannot incorporate nitrogen into organic compounds and therefore depend on _____ to make nitrogen available to them.
Animals
Bacteria
Protists
Fungi
Viruses

Answer 8

Bacteria

Question 9

What is the key process of processes driving the phosphorus cycle?
Evaporation
Photosynthesis and respiration
The weathering of rocks
Fixation by prokaryotes

Answer 9

The weathering of rocks

Question 10

What is the major concern with CFCs in the atmosphere
CFCs break down O2 molecules
CFCs are toxic to breathe, even in low concentrations
CFCs make too many O2 molecules
CFCs break down O3 molecules
CFCs cause cancer when they make contact with human skin

Answer 10

CFCs break down O3 molecules

Question 11

If the life history pattern for a species is to reproduce and then die, the species exhibits:
Iteroparity
Semelparity
Density-dependent reproduction
Dispersion

Answer 11

Semelparity