APES unit 5 test

second-growth forests ______.

are forests that establish themselves after old-growth timber has been removed

Aquaculture

can bring economic benefits and food security to many developing regions

in the western U.S., bark beetle outbreaks have become much worse than in the past for all of the following reasons EXCEPT ________.

catastrophic wildfires have resulted in the increased growth of the kinds of trees that the bark beetles prefer

Managing crop competitors and pests has been challenging to agronomists for centuries. One approach, integrated pest management, ________.

combines synthetic chemical pesticides with biocontrol techniques

what is the major factor driving the move to the suburbs from cities?

desire to live in less crowded, more peaceful conditions

the average consumer can reduce his/her ecological footprint the most by ________.

eating locally grown foods

the results of the over application of fertilization can include ________.

eutrophication in nearby waters

the worlds urban populations are ______.

growing at a faster rate than the global population as a whole

During the past half century, global food production has ________ world population growth.

grown at a faster rate than

deforestation ________.

has the greatest impacts in tropical areas and arid regions

drip irrigation is ________.

more than twice as efficient at conserving water as traditional conventional irrigation

for most Americans, factory farms and feedlots are their source for the produce shown in the figure. all of the following are negative impacts from factory farms and feedlots EXCEPT _______.

overgrazing

Currently, the greatest ecological crisis facing marine organisms and food webs is ________.

overharvesting

It is more energetically efficient for us to eat more ________.

plant-based foods

clear-cutting _______.

removes all trees from one area

Irrigation can result in the salinization of soils because ________.

salts in the water are deposited on the soil surface as water evaporates

which of the following is the best example,of an economic approach to reduce overfishing for a fish species with a declining population?

the federal government sets a catch limit (per person or per boat) for the species and imposes a tax on any extra fish that are caught.

why do developing nations impose few or no restrictions on logging?

they do not want to hinder economic development

No-till farming would be most beneficial for farmers ________.

with steeply sloped fields

managing crop competitors and pests has been challenging to agronomists for centuries. once approach, integrated pest management, ________.

combines synthetic chemical pesticides with biocontrol techniques

one way that consumers can help prevent a decrease in the number of fish species that are experiencing population declines is to

eat fish that are caught using sustainable harvesting methods, therefore ensuring fish populations remain stable and reducing the amount by catch harvested

organic farming ______.

has become more challenging because of contamination by GM crop varieties

green revolution techniques ________.

have increased crop yields but may not be sustainable

which of the following is a consequence of clearing forests for agriculture purposes?

soil erosion increases because the tree roots and other vegetation that stabilize the soil have been removed

cows require a high quantity of feed because they _______.

take time to grow and have a low energy conversion efficiency

the greatest general problem with the suburbs is _______.

that they spread environmental impact over a larger area

which of the following best explains why the maximum sustainable yield for ocean fisheries has been exceeded?

too many fish of reproductive age are harvested

your friend plants Roundup Ready seeds in her garden and several months later notices that her garden is overrun with weeds. She calls the seed company to complain. How should the customer service agent respond?

The customer service agent should point out that the Roundup Ready plants would survive being sprayed by Roundup. Your friend never used Roundup on her garden, so the weeds overran her garden.

Raising which of the following requires the least land and water per kg of protein produced?

eggs and chicken

Urban sprawl typically results in _______.

increased commuting distances

suburban living encourages _______.

increased use of automobiles

all of the following are landscaping features of green buildings EXCEPT ________.

landscaping with AstroTurf in dry environments

the major cause for the decline in the worldwide catch of fish since 1990 is

overfishing

If forests are strictly managed according to the maximum sustainable yield model, some biodiversity will still be lost because ________.

species whose habitat depends on mature trees in the top canopy layer will be excluded