Question 1

In the carbon cycle, one of the ways in which carbon is returned to the atmosphere is by respiration.
____________________

Accepted Answer

During respiration, living organisms release carbon dioxide back into the atmosphere. This is a natural part of the carbon cycle.

Question 2

Nitrogen fixation is the process by which gaseous nitrogen is converted to nitrate.
____________________

Accepted Answer

ammonia

Question 3

MATCHING
Match the component of the nitrogen cycle with its description.
a.assimilation
c.nitrification
b.denitrification
d.nitrogen fixation
-the principle enzyme is nitrogenase

Accepted Answer

The answer of MATCHING
Match the component of the nitrogen cycle...

Question 4

MATCHING
Match the component of the nitrogen cycle with its description.
a.assimilation
c.nitrification
b.denitrification
d.nitrogen fixation
-carried out by nitrifying bacteria

Accepted Answer

The answer of MATCHING
Match the component of the nitrogen cycle...

Question 5

Algae and cyanobacteria are examples of primary producers.
____________________

Accepted Answer

Algae and cyanobacteria are both photosynthetic organisms that convert light energy into organic compounds, making them primary producers in aquatic and some terrestrial ecosystems.

Question 6

The most abundant gas in the atmosphere is oxygen.
____________________

Accepted Answer

nitrogen

Question 7

In the African savanna, fire helps maintain the dominant vegetation.
____________________

Accepted Answer

Fire is a natural and necessary occurrence in the African savanna ecosystem. It helps to prevent trees and woody shrubs from taking over and promotes the growth of grasses and other herbaceous plants, which are the dominant vegetation in the savanna. Additionally, fire plays an important role in nutrient cycling and helps to support the diverse array of wildlife that calls the savanna home.

Question 8

The buildup of a toxin in an organism's body is called biological magnification.
____________________

Accepted Answer

bioaccumulation

Question 9

The organisms occupying the base of a pyramid of energy are autotrophs.
____________________

Accepted Answer

Autotrophs, such as plants or algae, are able to produce their own energy through photosynthesis or chemosynthesis, and they occupy the base of the energy pyramid as the primary producers.

Question 10

MATCHING
Match the component of the nitrogen cycle with its description.
a.assimilation
c.nitrification
b.denitrification
d.nitrogen fixation
-returns gaseous nitrogen to the atmosphere

Accepted Answer

The answer of MATCHING
Match the component of the nitrogen cycle...

Question 11

MATCHING
Match the component of the nitrogen cycle with its description.
a.assimilation
c.nitrification
b.denitrification
d.nitrogen fixation
-the process by which animals convert plant nitrogen compounds into animal nitrogen compounds

Accepted Answer

The answer of MATCHING
Match the component of the nitrogen cycle...

Question 12

A decomposer is also called a saprotroph.
____________________

Accepted Answer

This statement is true. A decomposer is an organism that breaks down dead organic material and is also referred to as a saprotroph.

Question 13

Gross primary productivity is the rate of photosynthesis minus the rate of plant respiration.
____________________

Accepted Answer

Net

Question 14

ENSO refers to a periodic warming of surface ocean waters.
____________________

Accepted Answer

ENSO (El Niño-Southern Oscillation) involves periodic changes in sea surface temperatures in the central and eastern Pacific Ocean, including warming phases known as El Niño.

Question 15

MATCHING
Match the component of the nitrogen cycle with its description.
a.assimilation
c.nitrification
b.denitrification
d.nitrogen fixation
-Rhizobium carries out this process

Accepted Answer

The answer of MATCHING
Match the component of the nitrogen cycle...

Question 16

The seasons are determined primarily by the Earth's tilt.
____________________

Accepted Answer

The Earth's axial tilt causes different parts of the Earth to receive varying amounts of sunlight throughout the year, leading to the changing seasons.

Question 17

MATCHING Match the component of the nitrogen cycle with its description. a.assimilation c.nitrification b.denitrification d.nitrogen fixation -converts N₂ to NH₃

Accepted Answer

The answer of MATCHING
Match the component of the nitrogen cycle...

Question 18

One element that does not cycle into the atmosphere is phosphorus.
____________________

Accepted Answer

The answer of One element that does not cycle into...

Question 19

An herbivore occupies the third trophic level.
____________________

Accepted Answer

second

Question 20

A rain shadow occurs in the dry lands on the sides of mountains facing the prevailing winds.
____________________

Accepted Answer

away from

Quiz 55: Ecosystems and the Biosphere

In the carbon cycle, one of the ways in which carbon is returned to the atmosphere is by respiration. ____________________

Nitrogen fixation is the process by which gaseous nitrogen is converted to nitrate. ____________________

MATCHING Match the component of the nitrogen cycle with its description. a.assimilation c.nitrification b.denitrification d.nitrogen fixation -the principle enzyme is nitrogenase

MATCHING Match the component of the nitrogen cycle with its description. a.assimilation c.nitrification b.denitrification d.nitrogen fixation -carried out by nitrifying bacteria

Algae and cyanobacteria are examples of primary producers. ____________________

The most abundant gas in the atmosphere is oxygen. ____________________

In the African savanna, fire helps maintain the dominant vegetation. ____________________

The buildup of a toxin in an organism's body is called biological magnification. ____________________

The organisms occupying the base of a pyramid of energy are autotrophs. ____________________

MATCHING Match the component of the nitrogen cycle with its description. a.assimilation c.nitrification b.denitrification d.nitrogen fixation -returns gaseous nitrogen to the atmosphere

MATCHING Match the component of the nitrogen cycle with its description. a.assimilation c.nitrification b.denitrification d.nitrogen fixation -the process by which animals convert plant nitrogen compounds into animal nitrogen compounds

A decomposer is also called a saprotroph. ____________________

Gross primary productivity is the rate of photosynthesis minus the rate of plant respiration. ____________________

ENSO refers to a periodic warming of surface ocean waters. ____________________

MATCHING Match the component of the nitrogen cycle with its description. a.assimilation c.nitrification b.denitrification d.nitrogen fixation -Rhizobium carries out this process

The seasons are determined primarily by the Earth's tilt. ____________________

MATCHING Match the component of the nitrogen cycle with its description. a.assimilation c.nitrification b.denitrification d.nitrogen fixation -converts N2 to NH3

One element that does not cycle into the atmosphere is phosphorus. ____________________

An herbivore occupies the third trophic level. ____________________

A rain shadow occurs in the dry lands on the sides of mountains facing the prevailing winds. ____________________

MATCHING Match the component of the nitrogen cycle with its description. a.assimilation c.nitrification b.denitrification d.nitrogen fixation -converts N₂ to NH₃