Question 1

A conservation group is deciding what land to preserve.Why might they want to consider an area of land where the ecosystem is partially damaged by a logging contract that cannot be overturned?

Accepted Answer

A)  Conservation groups often focus of fixing damaged land and ecosystems.
B)  When conservation groups choose land to preserve,they just consider what is best for the one target species that is endangered.
C)  By making logging difficult,they strengthen environmentalism.
D)  Human activity often leads to the evolution of unique species that take advantage of the disrupted environment.E) All of the above
F) B) and D)

Question 2

Sea otters have been used as an example of the "Keystone Species" concept.This means that sea otters

Accepted Answer

A)  are the base of the food chain in their ecosystem.
B)  are the dominant species in their ecosystem.
C)  exert a strong influence on the structure and functioning of their ecosystem.
D)  have been recently introduced and are recruiting other new species to the ecosystem.E) B) and D)
F) A) and D)

Question 3

A small island has stable populations of plants and animals,including one species of hawk but no other large predators.A ship docks at the island,and the ship's cat escapes.If the cat was pregnant,what do you think the sailors are likely to find if they return ten years later?

Accepted Answer

A)  The island will have similar flora and fauna,with the addition of a cat population.
B)  The increase in nitrogenous waste from the cats will increase plant productivity.
C)  The bird and lizard species on the island will have many new adaptations.
D)  Some species of ground-nesting birds may have gone extinct.
E)  Species that were formerly preyed upon by hawks will benefit.F) B) and E)
G) B) and D)

Question 4

One of the important reasons for maintaining biodiversity is to

Accepted Answer

A)  prevent loss of habitats that can be logged or farmed at some future date.
B)  prevent loss of habitat leading to edge effects.
C)  prevent introduction of invasive species.
D)  maintain the genetic diversity of wild relatives of common crops.
E)  prevent increased disease spread due to edge effects.F) B) and E)
G) B) and C)

Question 5

While reading an online science magazine,you come across an article on declining turtle populations across the globe.Based on the graph,what would you guess are the two biggest factors in the decline? Choose two.

Accepted Answer

A)  Harvesting of turtles for food,pets,or medicine
B)  Competition with invasive species
C)  Destruction of wetlands and breeding beaches
D)  Developmental problems due to rising temperatures
E)  Disease from introduced parasitesF) B) and C)
G) A) and C)

Question 6

The American redstart (Setophagaruticilla) is in serious decline.Scientists have been able to correlate health and breeding success to levels of 13C in their blood (a chemical signature indicating the source of their diet) .Birds with lower levels of 13C in their blood return to their spring breeding ground sooner,weigh more and produce more offspring.Based on this,what would you expect to find in the wintering grounds of the American redstart? Check all that apply.

Accepted Answer

A)  Limited availability of habitat in areas where plants have low13C
B)  Higher insect biomass in areas where plants have low13C
C)  A lack of territorial behavior being displayed by American redstarts
D)  Differences in food quality correlating with levels of 13C in the habitat
E)  Similar flora and fauna in all redstart habitats,unrelated to levels of 13CF) D) and E)
G) All of the above

Question 7

When New York City was given a choice to make regarding its drinking water

Accepted Answer

A)  they opted for more bottled water.
B)  they chose ecosystem maintenance over development.
C)  they had to construct expensive filtration plants to protect against disease.
D)  they chose ecosystem conversion to higher density housing for efficiency.
E)  they dug new and deeper wells rather than pay for desalinization.F) A) and C)
G) A) and D)

Question 8

Which of the following is a recognized way that the processes of natural selection and speciation may mitigate the concerns of conservation biologists?

Accepted Answer

A)  Hybridization between an introduced and a native species can promote speciation,especially in plants.
B)  Hybridization between two introduced species can promote speciation,especially in plants.
C)  Species that go extinct provide additional resources for populations that remain intact.
D)  The fragmentation of habitats promotes geographic isolation of populations,an important aspect of speciation.E) All of the above
F) C) and D)

Question 9

In the last 20 years one concern of scientists who study amphibians is that

Accepted Answer

A)  genetic diversity is being increased too rapidly for proper maintenance.
B)  the edge effects are causing declines in species numbers.
C)  DDT is affecting reproduction by thinning the egg membranes.
D)  populations are diversifying rapidly and speciation is occurring.
E)  many species are declining or have gone extinct in recent years.F) A) and E)
G) A) and B)

Exam 58: Conservation Biology

A small island has stable populations of plants and animals,including one species of hawk but no other large predators.A ship docks at the island,and the ship's cat escapes.If the cat was pregnant,what do you think the sailors are likely to find if they return ten years later?

Correct Answer
verified

While reading an online science magazine,you come across an article on declining turtle populations across the globe.Based on the graph,what would you guess are the two biggest factors in the decline? Choose two.

Correct Answer
verified

A conservation group is deciding what land to preserve.Why might they want to consider an area of land where the ecosystem is partially damaged by a logging contract that cannot be overturned?

Correct Answer
verified

Correct Answer
verified

Sea otters have been used as an example of the "Keystone Species" concept.This means that sea otters

Correct Answer
verified

In the last 20 years one concern of scientists who study amphibians is that

Correct Answer
verified

One of the important reasons for maintaining biodiversity is to

Correct Answer
verified

Which of the following is a recognized way that the processes of natural selection and speciation may mitigate the concerns of conservation biologists?

Correct Answer
verified

When New York City was given a choice to make regarding its drinking water

Correct Answer
verified

Exam 58: Conservation Biology

A small island has stable populations of plants and animals,including one species of hawk but no other large predators.A ship docks at the island,and the ship's cat escapes.If the cat was pregnant,what do you think the sailors are likely to find if they return ten years later?

Correct AnswerverifiedShow Answer

While reading an online science magazine,you come across an article on declining turtle populations across the globe.Based on the graph,what would you guess are the two biggest factors in the decline? Choose two.

Correct AnswerverifiedShow Answer

A conservation group is deciding what land to preserve.Why might they want to consider an area of land where the ecosystem is partially damaged by a logging contract that cannot be overturned?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Sea otters have been used as an example of the "Keystone Species" concept.This means that sea otters

Correct AnswerverifiedShow Answer

In the last 20 years one concern of scientists who study amphibians is that

Correct AnswerverifiedShow Answer

One of the important reasons for maintaining biodiversity is to

Correct AnswerverifiedShow Answer

Which of the following is a recognized way that the processes of natural selection and speciation may mitigate the concerns of conservation biologists?

Correct AnswerverifiedShow Answer

When New York City was given a choice to make regarding its drinking water

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified