A scientist isolates a single-celled organism from the bottom of a sulfur hot spring. When examined under the microscope, it is clear that the cell is very small and contains no nucleus. Based on this evidence alone, in what domain of life is this organism?
A. Archaea
B. It is impossible to determine anything based on this evidence alone
C. Eukarya
D. Bacteria
E. Either bacteria or archaea
Answer: E
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a. ? b. ? c. ? d. ? e. ?
Which of the following statements is TRUE
about NADPH? a. It is an enzyme. b. It is the oxidized form of NADP+. c. It is generated n the light-dependent reactions of photosynthesis. d. It accepts hydrogen and electrons from carbohydrates. e. It obtains energy from ATP.
____ are responsible for cell mediated immunity
a. Natural killer cells b. Monocytes c. T lymphocytes
d. B cells e. Macrophages
Animals that have a ventral nerve cord during embryonic development are classified as chordates
Indicate whether the statement is true or false