Which feature is necessary for a scientific hypothesis?
A) It is able to be proven true.
B) It is falsifiable.
C) It is a theory about something.
D) It is not based on observations.
B
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Genetic variation is not random
a. True b. False Indicate whether the statement is true or false
Which of the following is not a risk factor for hypertension?
1.smoking 2.obesity 3.chronic stress 4.diet high in fruits, vegetables, and dairy products 5.excessive salt intake
The student who caught the cold caused by this specific Rhinovirus was exposed to the exact same Rhinovirus 18 months later. What component of the immune system will protect her from getting the same cold again?
a. Plasma cells b. Antibodies that are "left over" from the last infection c. Dendritic cells d. Memory B cells
The evolutionary sequence in the development of a complex character can be best analyzed through
A. phylogenetics. B. synapomorphies. C. classification. D. taxonomy. E. homoplasies.