A retrovirus uses reverse transcriptase to make a DNA copy of RNA
Indicate whether the statement is true or false
TRUE
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You are walking along the beach and see the remains of an unknown animal washed up on shore. You examine its characteristics and see that it is gelatinous, transparent, bilaterally symmetric, and lacks tentacles. You provisionally identify its phylum according to which choice?
a. Gelatinous body rules out Cnidaria. b. Lack of tentacles rules out Cnidaria. c. Bilateral symmetry rules out Platyhelminthes. d. Transparent body rules out Ctenophora.
Which of the following is a disadvantage of dry heat methods such as using a Bunsen burner to incinerate microbes from an inoculating loop and the use of a hot air oven?
A. Bunsen burners and hot air ovens only reach a maximum of 100°C so they are not effective against endospores. B. Bunsen burners take too long to sterilize and hot air ovens are hazardous for the operators. C. Neither of these methods actually sterilize; they only kill vegetative cells. D. Use of an open flame can be dangerous and hot air ovens take much longer to sterilize than autoclaves.
As water freezes, ________
A) its molecules move farther apart B) it cools the surrounding environment C) its hydrogen bonds break apart D) it loses its polarity
If a researcher uses the same experimental set-up as another study to collect data, but uses different research subjects, it is considered:
a. exploration. b. replication. c. extrapolation. d. inductive reasoning. e. a two-tailed test of the hypothesis.