MD University College BIO 103 – What is the relationship between mosquitoes and humans

16 Jun MD University College BIO 103 – What is the relationship between mosquitoes and humans

Question
What is the relationship between mosquitoes and humans?

Competition
Mutualism
Predation
Question 2

Select one answer.

10 points

In southern Florida, pet Burmese pythons have escaped and established a population that now numbers in the thousands. In the Florida Everglades biologists report that midsized mammal prey (raccoons, opossum, bobcat, and deer) have declined by over 90% since the python became established. This describes a threat from…

overharvesting
pollution
habitat loss
introduced species
Question 3

Select one answer.

10 points

In real ecosystems, most animal predators are secondary consumers that eat only one kind of primary consumer and are eaten by only one kind of tertiary consumer.

True
False
Question 4

Select one answer.

10 points

Energy enters Earth’s ecosystems as _________ and exits as ___________.

heat; organic matter
sunlight; carbon dioxide
sunlight; heat
heat; sunlight
Question 5

Select one answer.

10 points

Which of the following demonstrates exponential growth?

2, 4, 6, 8, 10
2, 4, 8, 16, 32
2, 8, 14, 20, 26
2, 4, 2, 8, 3
Question 6

Select one answer.

10 points

Starting in the 1950s, populations of Atlantic cod were heavily fished by highly efficient commercial trawlers. Catches started to decline in the 1970s and by 1990 several of the fisheries were completely depleted. Was the cod population a renewable resource when fished at that level?

No, because growth and reproduction of the fish couldn’t keep up with the harvest.
Yes; plant and animal populations are always renewable resources.
Question 7

Select one answer.

10 points

Which is the best analogy for Earth as a global ecosystem? Earth is like…

An insulated and sealed box. Neither energy nor matter can enter or leave the closed system.
A wire cage. Both energy and matter can freely enter and leave the Earth.
A sealed but transparent box. Energy enters as light and leaves as heat, but matter is sealed in a closed system and must be recycled.
Question 8

Select one answer.

10 points

What is the currently accepted scientific explanation for anthropogenic global climate change?

The hole in the ozone layer lets in too much sunlight, warming the earth.
Heat escapes from engines, forest fires, machinery, power plants, etc.
Human activities raise greenhouse gas levels and strengthen the greenhouse effect.
Question 9

Select all that apply.

10 points

Wolves return to a river valley near Yellowstone National Park after a long absence. Which of the following are likely consequences? Select all that apply.When wolves return…

survival and diversity of young trees will increase because grazing pressure will be reduced.
abundance of elk and moose will increase because competition will be reduced.
diversity of songbirds and other tree-dwelling species will increase.
community diversity will collapse because wolves will eat everything.
Question 10

Select one answer.

10 points

The diagram below shows a/an…

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biogeochemical cycle.
food web
energy pyramid.
food chain
Question 11

Select one answer.

10 points

Which two activities are the main human activities that have led to increased levels of atmospheric carbon dioxide (CO2)?

Fertilizer use and natural gas extraction
Livestock production and rice paddy agriculture
Burning fossil fuels and clearing forests
Breathing and decomposition
Question 12

Select one answer.

10 points

In the diagram below, the toad is at trophic level…

.png” alt=”https://oli.cmu.edu/repository/webcontent/a5ff8a4c80020ca600f4ff847d8b5afa/_u8100_ecology/webcontent/trophic_quiz.png”>

4
5
2
1
3
Question 13

Select one answer.

10 points

In the course of its biogeochemical cycling, lots of things can happen to a nitrogen atom. Which of the options below accurately describes what cannot happen to it?

It will never become incorporated into the protein molecules of a living organism.
It will never be mixed into water or become part of the ocean.
It will never be destroyed or converted to another element.
It will never become part of the air.
Question 14

Select one answer.

10 points

A population grows by 5% per year for 20 years. In other words, the per capita rate of increase, 0.05, stays constant for the 20-year period. What type of growth does this population demonstrate?

Exponential
Logistic
Linear
Question 15

Select one answer.

10 points

Yellowstone Wolf Project Annual Report 2010

Variable

Value in 2010

N (population size)

97

annual number of births

38

annual number of deaths

9

total land area

8,987 km2

What is the per capita death rate for 2010?

88
0.001
11
0.09