If two different species of fish fossils were found in two different layers of sedimentary rock, what might one infer about the specimens?
A. The species in the higher layer evolved from the species in the lower layer
B. The two species are unrelated
C. They died at the same time
D. The species in lower layer died first
E. The species in the higher layer died first
Answer: D
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A(n) __________ feedback mechanism will keep your internal temperature at 98.6?F
Fill in the blank(s) with the appropriate word(s).
Based on the literature, you hypothesize that students in traditional biology lectures will have the same grades as students in online biology lectures. You decide to test your hypothesis by comparing grades of students in traditional and online biology lectures over a semester. As a result of the experiment, you observe that the grades in the traditional lectures and the grades in the online
lectures are not significantly different. What do these observations allow you to do? A. develop a scientific theory B. reject the hypothesis C. accept the hypothesis without further question D. reject the null hypotheses
The site of DNA replication is localized to the ________ within the mitochondrion.
Fill in the blank(s) with the appropriate word(s).
Which statement is NOT true about DNA replication?
A. It occurs more rapidly in bacteria than in eukaryotes. B. One strand of new DNA is replicated faster than the other strand at the replication fork. C. DNA replication is considered semiconservative because there is always an old strand acting as a template for a new strand. D. It proceeds in a 5'-to-3' direction only. E. DNA can only replicate at one point on a chromosome at one time.