Scientists hypothesize that the massive Permian extinction was triggered by an asteroid impact
a. True
b. False
ANSWER: False
You might also like to view...
In the Hershey and Chase experiment, phage-infected bacteria and viral progeny were radioactive following bacterial
infection with 32P-labeled viruses. Why?
a. Bacteria had incorporated radioactive proteins into their DNA. b. Bacteria and viral progeny had incorporated 32P into their DNA. c. Viral progeny had used the 32P to build new viral proteins. d. Bacteria had incorporated radioactive proteins into their cell membranes. e. 32P was left outside the cell during viral infection.
When ATP breaks down into ADP and a phosphate group,
a. energy is absorbed by ADP and transferred to enzymes. b. energy is released and can power cellular activities. c. ADP becomes the active site in an enzyme. d. the energy in the broken bond is transferred to the phosphate group.
The wing of a bald eagle is ________ the wing of a penguin
A) convergent with B) homologous to C) unrelated to D) analogous to
Resident biota are found in/on the ________.
A. mouth B. large intestine C. nasal passages D. skin E. All of the choices are correct.