The big difference between prokaryotes and eukaryotes is that eukaryotes have ________, and prokaryotes do not.
What will be an ideal response?
membrane-bounded organelles
membrane-bound organelles
membrane bounded organelles
membrane bound organelles
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The fluid nature of the membranes is attributed to a lateral movement of
A. pumps such as the proton pump. B. phospholipid molecules. C. the entire lipid bilayer. D. antigen molecules. E. protein channels.
In the nervous system, integration ________
A) occurs at the axon B) inevitably results in the attainment of a threshold potential C) is the analysis and interpretation of sensory signals and the formulation of appropriate responses D) is the assimilation of memories
Evolution by genetic drift is most obvious in
A) migratory species. B) large populations. C) small populations. D) aquatic organisms. E) invertebrate species.
The number of described species is estimated to be 10 million.
a. true b. false