In which of the following ways are archaea similar to eukaryotic cells?
a. size
b. shape
c. presence of histones
d. DNA polymerases
e. presence of operons
Ans: c. presence of histones
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Which of the following radioisotopes could be used to accurately date a fossil that is thought to be over 750 million years old?
A. uranium 238 B. carbon 14 C. uranium 235 D. uranium 235 or uranium 238 E. carbon 14 or uranium 235
The peptidyl transferase is a component of
A. DNA. B. tRNA. C. the ribosome D. the protein being translated. E. mRNA.
Research with the herpes virus herpesvirus 8 focused on the transition from ____
a. G1 to S b. S to G2 c. G1 to G0 d. G2 to prophase e. telophase to cytokinesis.
What traits do green algae and plants have in common?
A. embryos B. chlorophyll a and b C. plastids D. a sporic life cycle E. beta-carotene