The air we breathe resides in the lowermost layer of the atmosphere called the _

Question

The air we breathe resides in the lowermost layer of the atmosphere called the ____.

options: 1) troposphere

2) stratosphere

3) ozone layer

4) geosphere

5) biosphere

Question 17 Food chains and food webs show how producers, consumers, and decomposers are connected to one another as chemical energy flows through different ____ in an ecosystem.

1) secondary producers

2) trophic levels

3) biospheres

4) the hydrologic cycle

5) abiotic components

Unlike nitrogen or carbon, phosphorus ____.

Question 20 options: 1) does not cycle through the atmosphere and it cycles more slowly

2) is not passed up the food chain to consumers

3) is not involved in plant growth

4) is plentiful and rarely limits primary productivity

5) cycling has not been affected by humans

If the biomass of flowers that support the butterflies was known to contain 100,000 units of energy, and certain bird species were eating the butterflies that foraged on the flowers, what amount of energy, on average, could be expected to be transferred to the birds?

Question 16 options: 1) 10

2) 100

3) 1,000

4) 10,000

5) 50,000

A grassy meadow high in the Sierra Nevada Mountains of eastern California is known to support a variety of organisms. During the summers when grass is thick and lush, and wildflowers abound, butterflies take advantage of this abundant nectar source. Bears graze on the berries in shrubs at the edge of the meadow. Deer also forage at the edge of the meadow. In the early mornings, coyotes are known to prey on the squirrel and mouse populations that burrow into the meadow soil. A variety of birds prey on the butterflies and other flying insects, such as bees and wasps. The coyotes would be classified as ____. Question 14 options: 1) producers

2) primary consumers

3) secondary consumers

4) decomposers

5) tertiary consumers

A grassy meadow high in the Sierra Nevada Mountains of eastern California is known to support a variety of organisms. During the summers when grass is thick and lush, and wildflowers abound, butterflies take advantage of this abundant nectar source. Bears graze on the berries in shrubs at the edge of the meadow. Deer also forage at the edge of the meadow. In the early mornings, coyotes are known to prey on the squirrel and mouse populations that burrow into the meadow soil. A variety of birds prey on the butterflies and other flying insects, such as bees and wasps. Coyotes typically forage on mice and squirrels. However, as members of the canine family, Canidae, they also eat berries and parts of plants. As such, coyotes are classified as ____. Question 15 options: 1) herbivores

2) carnivores

3) omnivores

4) detritivores

5) producers

Ecologists study interactions from the level of ____ to the level of ____. Question 4 options: 1) ecosystems; the biosphere

2) cells; ecosystems

3) organisms; the biosphere

4) populations; communities

5) atoms; populations Pronghorn

antelope live in the high desert of the Great Basin in the western U.S. Which of the following items are possible abiotic factors that an antelope has to contend with? Question 7 options: 1) the density of the local population of coyotes

2) parasites such as ticks

3) competition with wild horses for sparse vegetation for forage

4) poisonous or thorny plants

5) extreme maximum and minimum temperatures in the desert

Which of the following best represents the process of photosynthesis? Question 9 options: 1) carbon dioxide + glucose + solar energy water + oxygen

2) carbon dioxide + water + solar energy glucose + oxygen

3) oxygen + glucose + solar energy carbon dioxide + water

4) oxygen + glucose solar energy + carbon dioxide + water

5) carbon dioxide + water solar energy + glucose + oxygen

Explanation / Answer

Ans ) The air we breathe resides in the lowermost layer of the atmosphere called the

option a: troposphere

Ans 17) Food chains and food webs show how producers, consumers, and decomposers are connected to one another as chemical energy flows through different ____ in an ecosystem.

option 2- trophic levels

Question 20 ) Unlike nitrogen or carbon, phosphorus ____.

options: 1) does not cycle through the atmosphere and it cycles more slowly

because the atmosphere is not a reservoir for phosphorous nor do microorganisms fix phosphorous, phosphorous enters biosphere almost entirely from the soil through absorbtion by plant roots.

Question 16 ) If the biomass of flowers that support the butterflies was known to contain 100,000 units of energy, and certain bird species were eating the butterflies that foraged on the flowers, what amount of energy, on average, could be expected to be transferred to the birds?

option 3) 1000

only 10 percent of the energy is passed through each trophic level .

so from flowers to butterfly: 10% of 100000

=10000

from butterfly to birds = 10% of 10000

= 1000

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