Which of these statements about hypertension is true?
A. Blood pressure is less than 120/80.
B. Poor diet and lack of regular exercise puts one at increased risk.
C. Sickle-cell anemia often accompanies this condition.
D. Most Americans with the condition seek treatment.
E. Atherosclerosis is another name for this condition.
Answer: B
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Coadaptation occurs when two or more species interact closely in the same ecological setting
Indicate whether the statement is true or false.
A superinfection results from
A) An immune system reaction to the drug. B) Decrease in most normal flora with overgrowth of an unaffected species. C) All of these choices are correct D) The wrong drug administered to the patient. E) Build up of a drug to toxic levels in the patient.
Which of the following most adequately describes how the Alu element may have proliferated to constitute 10% of the human genome?
A. Multiple retroelements code the same gene. B. Retroelements increase with every generation. C. A single retroelement can be copied into many RNA transcripts. D. Retroelements increase with each cell division. E. Retroelements show self-proliferation.
According to the figure, the alga produces the least
amount of oxygen at __________ nanometers. a. 680 b. 700 c. 400 d. 475 e. 550