Which process produces the most variation within a species?
A. asexual reproduction
B. sexual reproduction
C. mitosis
D. cloning
Ans: B. sexual reproduction
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Bacteria and eukarya both contain membrane-bound organelles
Indicate whether this statement is true or false.
Woese
A. was involved in determining rRNA sequences. B. proposed breaking prokaryotes into two groups. C. proposed breaking eukaryotes into Domains Archaea and Bacteria. D. was involved in refining the Gram stain for classification purposes. E. was involved in determining rRNA sequences AND proposed breaking prokaryotes into two groups.
________ are hollow tube-like structures that hold some archaeal daughter cells together after cell division while ________ are grappling hook-like structures that appear to attach archaeal cells to surfaces.
A. Cannulae; pili B. Cannulae;hami C. Pili; hami D. Hami; fimbriae
The spinal cord transmits information between peripheral nerves and the:
a. sympathetic nervous system b. autonomic nervous system c. parasympathetic nervous system d. white matter e. brain