 |
| 1 | |
There would be no life in the oceans without organisms called ______ and ______. |
| | A) | decomposers, phytoplankton |
| | B) | zooplankton, consumers |
| | C) | phytoplankton, zooplankton |
| | D) | zooplankton, scavengers |
|
|
|
| 2 | |
One model that shows how energy passes from organism to organism is called |
| | A) | an energy link |
| | B) | a food chain |
| | C) | a phytoplankton cycle |
| | D) | photosynthesis |
|
|
|
| 3 | |
Which of the following two organisms are producers? |
| | A) | plants and phytoplankton |
| | B) | plants and consumers |
| | C) | consumers and phytoplankton |
| | D) | phytoplankton and chlorophyll |
|
|
|
| 4 | |
Producers make food using ______ to trap the Sun's energy in a process called photosynthesis. |
| | A) | food chains |
| | B) | chlorophyll |
| | C) | cellular respiration |
| | D) | microscopic organisms |
|
|
|
| 5 | |
The process shown in this diagram is
 <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0070947864/164529/bcscience7_ch2_quiz1_q5.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (32.0K)</a>]]>
|
| | A) | waste elimination |
| | B) | cellular respiration |
| | C) | a food chain |
| | D) | photosynthesis |
|
|
|
| 6 | |
A food web is more realistic than a food chain for showing the feeding relationships in ecosystems because |
| | A) | it compares the number of consumers to the number of micro-organisms in an ecosystem |
| | B) | food chains use only a small sampling of organisms. |
| | C) | a food web explains why there are more producers than consumers. |
| | D) | producers are usually eaten by many different consumers and most consumers are eaten by more than one predator |
|
|
|
| 7 | |
To show how many organisms are at each level of a food chain, ecologists use a model called |
| | A) | an energy flow pyramid |
| | B) | a pyramid of numbers |
| | C) | a pyramid of energy |
| | D) | a food chain/food web pyramid |
|
|
|
| 8 | |
A pyramid of numbers shows that in an ecosystem |
| | A) | there are always a large number of producers at the bottom and fewer top consumers |
| | B) | there are always a large number of top consumers and fewer producers |
| | C) | there are an equal number of producers and consumers |
| | D) | there are more top consumers than primary consumers |
|
|
|
| 9 | |
What do ecologists call the transfer of energy that begins with the Sun and passes from one organism to the next in a food chain? |
| | A) | a food web |
| | B) | a top consumer |
| | C) | energy flow |
| | D) | a pyramid of numbers |
|
|
|
| 10 | |
Only a small amount of the energy stored in food is available to the next organism in a food chain because |
| | A) | there are more producers than consumers in a food chain |
| | B) | there are fewer top consumers than producers in a food chain |
| | C) | primary and secondary consumers compete for food |
| | D) | most of the energy is used for life processes |
|
|
.