Four elements combine to make about 96% of the mass of the human body. Which of the following elements is one of the four?
A. calcium
B. iron
C. phosphorus
D. carbon
D. carbon
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Individuals with a condition known as exercise intolerance suffer extreme fatigue from minimal exertion. Name the organelle that, if defective, is most likely to cause this condition. Explain your reasoning
What will be an ideal response?
Which whorl of the flower contains the female reproductive parts?
A. whorl 2 B. whorl 3 C. whorl 1 D. whorl 4 E. whorl 5
The "stress hormone" involved in stomatal closure during water stress is:
a. abscisic acid. b. auxin. c. cytokinin. d. ethylene. e. gibberellin
Viruses infect every organism that has been investigated for their presence. However, viruses can only replicate in
A. a very limited manner if they are a retrovirus. B. a very limited number of the host's cells. C. their lytic stage outside the host cell membrane. D. very limited conditions, depending on their capsid type. E. a very limited manner depending on their envelope capability with the host's cell membrane or cell wall.