The amount of energy lost as it passes from one trophic level to another is approximately
A) 50%. B) 99%. C) 75%. D) 90%. E) 63%.
D
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Nucleic acid probes are NOT suitable for the detection of viruses
Indicate whether the statement is true or false.
Which mutation is an example of an adaptation?
a. A mutation results in decreased sperm count in humans. b. A mutation is found to be the cause of Alzheimer's Disease. c. A mutation results in hairless cats, reducing allergies in humans. d. A mutation increases the size of tomato plants. e. A mutation renders an individual immune to HIV infection.
The polysaccharide that helps strengthen cell walls in transport tissues of hornworts is called ____
a. xylan b. chlorophyll c. lignin d. chlorophyll a e. chlorophyll b
Identify the chemical(s) that act(s) as a buffer in human blood:a
bicarbonate b. hydrogen ions c. carbon dioxide d. water e. hydroxide ions