Which of the following was likely the host cell during primary endosymbiosis?
a. an archaeon
b. an H2-producing bacterium
c. an H2-using bacterium
d. a photosynthetic bacterium
Answer: A
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A. Drosophila melanogaster B. C. elegans C. Xenopus laevis D. Arabidopsis thaliana
Graded potentials are particularly important for conveying stimulus intensity in
A. sensory neurons. B. motor neurons. C. interneurons. D. skeletal muscle cells. E. Schwann cells.
Areas with upwelling support the greatest biomass of plankton
Indicate whether the statement is true or false
Which of the following statements is false concerning the value ?H?
A) ?H is the change in heat content. B) ?H is the change in enthalpy. C) In biology, ?H is basically the same as ?E. D) A reaction with a positive ?H value is exothermic. E) ?H = ?E + ?(PV)