Which group is NOT a domain in the tree of life?
a. Viruses
b. Bacteria
c. Archaea
d. Eukarya
Answer: A
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When two different species require the same resources we may observe
a. intraspecific competition. b. resource partitioning. c. interspecific competition. d. predation. e. symbiosis/parasitism.
Point mutations
A. are due to a change in one DNA nucleotide B. may change a specific codon C. can cause a genetic disease such as sickle cell disease that is due to a base change that codes for valine rather than glutamate D. all of the choices are correct
All of the following are true of the classical pathway of complement activation except __________.
A) activated C1 activates C2 and C4 B) C3 is the first component to be activated C) C5b joins C6, C7, C8, and C9 to form the membrane attack complex D) C1 is activated by an antigen-antibody complex E) activated C2a and C4b activate C3
Which of the following protozoa genera helps termites digest wood?
A) Trichonympha B) Nosema C) Trichomonas D) Spirogyra E) Naegleria