High School Biology : Understanding Energy Flow
Study concepts, example questions & explanations for High School Biology
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Example Questions
Example Question #11 : Understanding Energy Flow
Which of the following can be described as a symbiotic relationship in which both species benefit?
Mutualism
Parasitism
Predation
Commensalism
Mutualism
There are various forms of symbiosis. In mutualism both species benefit while in commensalism only one species benefits and the other species is left unaffected. In parasitism, one species is harmed while the other benefits. Last, predation is defined a predator-prey relationship in which one species feeds on another.
Example Question #12 : Understanding Energy Flow
Which of these choices is the original source of energy that humans receive from consuming an herbivore such as a cow?
The grass the cows grazed upon
The proteins and fatty acids in the cow
The sun
The nutrients the grass absorbs and makes itself
The glucose we make from eating the cow
The sun
It is true we derive energy from eating meat. And it is also true that the cow derives its energy from the grass it eats; however, ultimately the sun provides the raw energy for the grass to synthesize biomolecules that the cow uses to synthesize its biomolecules after eating the grass. When we consume a cow, we convert its energy to energy we can in the form of molecules such as glucose. The ultimate or very first energy source is the sun.
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