# Biology Final - Mastering Biology

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question
In the ecosystem energy budget, primary productivity is like _____. - Debt - Income - Interest Rate - Spending
Income
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A young, growing calf kept in ideal conditions consumes 100 pounds of grain. As a result, you would expect the calf to put on about _____ pounds of biomass. - 100 - 50-75 - 10-15 - 1-2
10 - 15
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To measure primary productivity in a grassland ecosystem, you should _____. - exclude consumers; periodically mow, collect, and weigh the plants; and calculate plant biomass production per unit time - measure the solar energy influx to the site - measure the growth of all of the consumers in the system - measure the total biomass of organisms per unit area
Exclude consumers; periodically mow, collect, and weigh the plants; and calculate plant biomass production per unit time.
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You set up a wildlife park that is designed to simulate African grassland. You calculate that the park's area will support 1,000 medium-sized grazing herbivores. You also want to be able to keep a lion population going without supplemental feeding. What is the approximate maximum population of lions that the herbivores might support, assuming that each lion's biomass is equivalent to a single herbivore's? - 1 - 10 - 100 - 1,000
100
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One hundred vegetarian residents of a farming village raise various crops for their own consumption on a parcel of land. They satisfy all of their food needs from the land. An investor purchases the land, evicts the farmers, and converts the land to pasture. Assuming that the primary productivity of the pasture grass equals that of the crops that were previously grown, how many people might be supported on a diet of beef produced by the ranch? - more than 100, because beef is a higher quality food source than the crops it replaces - about 100 - about 50 - at most 10
At most 10
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In an ecosystem, phytoplankton are _____. - tertiary consumers - secondary consumers - producers - detritivores - primary consumers
Producers
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An earthworm that feeds on the remains of plants and animals is acting as a _____. - tertiary consumer - producer - secondary consumer - detritivore - primary consumer
Detritivore (Decomposer)
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When a human eats a steak, the human is acting as a _____. - producer - primary consumer - secondary consumer - tertiary consumer - detritivore
Secondary Consumer
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A cow eating grass is an example of a _____. - primary consumer - secondary consumer - producer - tertiary consumer - detritivore
Primary Consumer
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A human who just ate a hamburger is eaten by a shark while swimming. The shark is acting as a _____. - secondary consumer - primary consumer - producer - detritivore - tertiary consumer
Tertiary Consumer
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Nitrogen is an important component of two types of molecules essential for life. These two are: - carbohydrates and DNA - proteins and DNA - proteins and carbohydrates (sugars)
Proteins and DNA
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Which of these are the two major sources of nitrate pollution in rivers? - the burning of fossil fuels by factories and cars - animal wastes and the burning of fossil fuels by cars - animal wastes and fertilizers - fertilizer runoff and the burning of fossil fuels by cars - animal wastes and the burning of fossil fuels by factories
Animal wastes and fertilizers
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Aquatic nitrate pollution can result in _____. - algal bloom - oxygen depletion - fish kills - hypoxia - an algal bloom that, when the algae die and are decomposed by bacteria, leads to hypoxia and the death of fish
An algal bloom that, when the algae die and are decomposed by bacteria, leads to hypoxia and the death of fish.
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Excess nitrogen in drinking water: - can cause red blood cells to burst giving the skin a pinkish hue - can lead to blue baby syndrome, a potentially fatal disease - was found in 3/4 of the nation's water supplies in a 1995 study - pushes oxygen into the brain at such a rate it may cause a stroke
Can lead to blue baby syndrome, a potentially fatal disease.
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Humans obtain the necessary nitrogen to survive directly from: - our food - our food and the air we breathe - the air we breathe
Our food
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After DDT was sprayed in Uganda, organic farming companies said they wouldn't return for how long? - 5 years - 10 years - 15 years - 20 years
15 years
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What does the World Health Organization think of indoor DDT use in Uganda? - They condemn it. - They haven't said. - They are undecided. - They condone it.