How does a scientific theory differ from a scientific hypothesis?
A) Theories are proposed to test scientific hypotheses.
B) Theories are usually an explanation for a more general phenomenon; hypotheses typically address more specific issues.
C) Hypotheses are usually an explanation for a more general phenomenon; theories typically address more specific issues.
D) Confirmed theories become scientific laws; hypotheses become theories.
B
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Which of the following statements is TRUE?
a. Each new cell receives half of the number of chromosomes in the original cell. b. Each new cell receives copies of all the original chromosomes. c. If the original number of chromosomes was 46, each new cell will have 23. d. The sister chromosomes are not identical due to breakages in the DNA. e. All chromosomes are duplicated except the sex chromosomes.
N-fixing bacteria
What will be an ideal response?
In a species where females typically mate with multiple males
A. there is no competition between males B. males likely compete indirectly with each other through sperm competition for successful fertilization of a female's eggs C. males likely compete directly with each other for the opportunity to male with a female D. males may have elaborate penis morphologies or large ejaculate volumes E. females may have the ability to preferentially use sperm from a specific male
Humans are the only hosts of Rickettsia rickettsii.
Answer the following statement true (T) or false (F)