The first cells were ____.
A. autotrophic
B. parasitic
C. anaerobic
D. aerobic
E. necrotic
Answer: C
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The tertiary structure of a protein is dependent on
A. the side chain composition of each amino acid within the protein. B. hydrogen bonding between the carboxyl and amino groups within the polypeptide chain. C. the interactions of multiple polypeptide chains that make up a functional protein. D. the way in which the peptide bond forms. E. the degree through which the dehydration reaction occurs.
Biosafety Level 4 agents:
a. include those that are the common agents of infectious disease. b. require only standard good laboratory technique. c. include M. tuberculosis, M. gordonae, and Brucella. d. require the use of maximum containment facilities.
If van der Waals forces are weak, how can geckos utilize these forces to cling to and walk up vertical smooth
surfaces?
What will be an ideal response?In humans, the thirst center is located in the ____
a. adrenal cortex b. hypothalamus c. anterior pituitary d. pons e. thymus