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Q 1/19
Score 0
How do most primary producers make their own food?
30
by using light energy to make carbohydrates
by breaking down remains to make carbon dioxide
by using chemical energy to make carbohydrates
by changing water into carbon dioxide
Q 2/19
Score 0
Only 10 percent of the energy stored in an organism can be passed on to the next trophic level. Of the remaining energy, some is used for the organism’s life processes, and the rest is what?
30
used in reproduction
stored as body tissue
eliminated as heat.
stored as heat.
19 questions
Q.
How do most primary producers make their own food?
1
30 sec
Q.
Only 10 percent of the energy stored in an organism can be passed on to the next trophic level. Of the remaining energy, some is used for the organism’s life processes, and the rest is what?
2
30 sec
Q.
The illustration shows a marine food web. Pyramids often are used to show the relative amount of energy that each organism in the next higher level can obtain from the lower-level organism. Which organisms in this food web would make up the lowest level of the pyramid?
3
30 sec
Q.
Which of the following correctly describes the difference between mutualism, commensalism, and parasitism?
4
30 sec
Q.
Energy is distributed among trophic levels in an ecosystem. Which of the following organisms in an African savanna ecosystem exists at the level with the greatest amount of available energy
5
30 sec
Q.
After an ecological disaster, the reestablishment and development of an area begins. Which is the correct order of events that occur during primary succession?
1. Soil creation occurs as organisms die and degrade.
2. Pioneer species begin growing.
3. Fertile soil and mature plants are seen.
4. Volcano erupts.
6
30 sec
Q.
Scientists speculate that Earth is undergoing a major climate change. What is one of the environmental changes that may result?
7
30 sec
Q.
Which of the following BEST describes the impact of introducing pythons, which are invasive predators, in the Florida Everglades?
8
30 sec
Q.
Nitrogen fixation is an important part of the Nitrogen Cycle. Nitrogen fixation is carried out primarily by what?
9
30 sec
Q.
Which of Earth's cycles does not depend on biotic interactions in order to be maintained?
10
30 sec
Q.
A species is a group of similar organisms that
11
30 sec
Q.
Which term refers to the process by which individuals that are better adapted to their environment are more likely to survive and reproduce?
12
30 sec
Q.
What evidence suggests that the ancestors of whales once walked on land?
13
30 sec
Q.
If two organisms look very similar during their early stages, this is evidence that the organisms
14
30 sec
Q.
A trait that helps an organism survive and reproduce is called a(n)
15
30 sec
Q.
Scientists combine evidence from fossils, body structures, early development, and DNA and protein structures to
16
30 sec
Q.
How does natural selection lead to evolution?
17
30 sec
Q.
Organisms that are least likely to experience extinction over the long term are most likely to be found in _______________.
18
30 sec
Q.
What is the connection between genetics and natural selection?
