An atom that is negatively charged because it has accepted an electron is a(n):
A. isotope.
B. isomer.
C. ion.
D. monomer.
C. ion.
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An echinoderm's endoskeleton is comprised of ossicles
Indicate whether the statement is true or false
You have inoculated a Clostridium species into a tube of media. After incubation, you observe that there is no growth, and you remember that Clostridium is an obligate anaerobe. What is the best explanation for the observed lack of growth?
A. There is not enough oxygen for use when toxic oxygen is present. B. There is not enough water in the environment for Clostridium to grow. C. Oxygen in the medium destroys the enzymes needed by Clostridium to undergo aerobic respiration. D. Clostridium does not have enzymes to process toxic oxygen.
The hominoids and the __________ share a common ancestor that diverged to form these two groups
a. lemurs b. tarsiers c. New World monkeys d. orangutans e. Old World monkeys
Inside the human body, the mitochondria ________ .
a. help to assemble amino acids into proteins b. function as a constituent part of cell membranes c. house enzymes that are involved in the process of energy metabolism d. are located outside the cytoplasm e. are located in the nucleus