What is one characteristic that archaea and eukaryotes share?
a. horizontal gene transfer
b. chemoautotrophs
c. organize DNA around histone proteins
d. multiple plasmids
e. similar cell wall components
c
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About ________ average-sized bacteria could fit into a human cell.
A) 10 B) 100 C) 1,000 D) 10,000
Which subatomic particle contains the neutral charge?
a. Electron b. Proton c. Both the proton and neutron d. Neutron e. Both the neutron and electron
Four of the following are components of the appendicular skeleton. Which one is the exception?
a. arm bones b. collarbones c. finger bones d. ribs e. leg bones
Net primary productivity is generally greatest at
A) tropical latitudes near the equator. B) subtropical latitudes (e.g., 25° of latitude). C) temperate latitudes (e.g., 50° of latitude). D) polar latitudes (e.g., 80° of latitude).