Edmentum Mastery Test Answers

What is the measurement of a population per unit area?

population density

Overcrowding is an example of

density dependent factor

What is a survivorship curve?

It shows the number of individuals living at each age interval plotted versus time. It helps to compare life histories of different populations. You can compare the life histories of birds, frogs, and humans at the same time. It is also known as a mortality table.

random population distribution

haphazardly located individuals, with no pattern

clustered population distribution

Clustered population is where many people are living in the small area. ..

scattered population distribution

A scattered population is a population distribution when a small amount of people are living in a big area. Scattered populations have limited resources and only a little amount of people are supported.

Claire, an ecologist, is finding it difficult to identify an interaction in nature because of changing environmental conditions and the complex indirect interactions of multiple species. Which interaction is Claire trying to find in nature?
A. interference competition
B. apparent competition
C. exploitation competition
D. predation
E. symbiosis

B. apparent competition

Commensalism

A relationship between two organisms in which one organism benefits and the other is unaffected

predation

An interaction in which one organism kills another for food.

exploitation competition

organisms compete indirectly through the consumption of a limited resource

mutualism

A relationship between two species in which both species benefit

parasitism

A relationship between two organisms of different species where one benefits and the other is harmed

What are the regions in the environment that provide basic needs, such as food, shelter, mates for reproduction, and protection, for survival of living organisms?

Habitats are regions in the environment that provide basic needs, such as food, shelter, mates for reproduction, and protection, for survival of living organisms.

In a certain region, children are considered economic benefits. A rising trend in the fertility levels of the region is observed. Last year the fertility rate in that region was four children per woman. It is predicted that the fertility rate is going to be six children per woman due to increasing poverty.
If the predictions are true then the population of that region will increase resulting in an INCREASE or DECREASE in food insecurity

INCREASE

According to United Nations predictions, what will be the total population of the world by 2100?
A. 9 billon
B. 10 billon
C. 11 billon
D. 40 billon
E. 8 billon

C. 11 billon

Throughout the world countries are dumping their garbage in the oceans. This dumping has affected the fish and other aquatic organisms of the oceans. Many fishing industries have collapsed due to this extensive dumping. Which theory explains this scenario?
A. intensity of demand theory
B. demographic transition theory
C. age structure theory
D. tragedy of the commons theory
E. zoning theory

D. tragedy of the commons theory

Which of these is included under land use?
A. water
B. rocks
C. trees
D. soil
E. applying pesticides

E. applying pesticides

In which types of countries is the human population increasing sharply?

underdeveloped countries

The death rates in the United States decreased more than 40 percent from 1930 to 2015. Which factor could have contributed to this decrease?
A. increased food insecurity
B. better medical facilities and treatments
C. decreased farmland
D. refusal of vaccines
E. illiteracy

B. better medical facilities and treatments

Only 200 Greater Bamboo Lemur exist currently. Scientists use artificial insemination to broaden the gene pool of this endangered species. This procedure is carried out in the natural habitats of this species. Which type of species conservation method is being used?

assisted reproduction method is used to broaden the gene pool of the lemurs

in-situ conservation

n situ conservation is the on-site conservation of genetic resources in natural populations of plant or animal species such as forest genetic resources, in natural populations of tree and animal species.

Which method involves breeding animals in a controlled environment?
A. inbreeding
B. captive breeding
C. outbreeding
D. crossbreeding
E. genetic breeding

B. captive breeding

Which of these activities doesn't imply poaching of wildlife?
A. hunting
B. killing
C. capturing
D. trading
E. breeding

E. breeding

Biologists want to increase the number of animals in a population. They suggest that if a minimum number of animals are protected, they will help prevent the extinction of a species. Which method will help the biologists' idea?
A. habitat manipulation
B. hunting
C. captive breeding
D. assisted reproduction
E. establishing wildlife management areas

E. establishing wildlife management areas

The black softshell turtle was a species found in the freshwaters of India. This species can now survive only in a manmade pond. According to the Red List of Threatened Species, the black softshell turtle will be classified under which level?
A. critically endangered
B. endangered
C. extinct in the wild
D. extinct
E. vulnerable

C. extinct in the wild

What is the threat to rats?

loss of food grains

What is the threat to deer?

collision with cars

What is the threat to cougurs

threat to livestock