List the similarities and differences between prokaryotic and eukaryotic cells. Identify three ways that
these differences impact cell function.What will be an ideal response?
Similarities between prokaryote and eukaryote cells are that each have plasma membranes, cytosol,
ribosomes, DNA, and RNA. Eukaryotes have membrane bound organelles which includes a nucleus
with linear DNA, mitochondria, rough and smooth endoplasmic reticulum,
and vesicles.
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Chemical evolution may have become relatively sophisticated before cells first arose in ________
a. hydrothermal vents and on clay particles in shallow mud flats b. nebulae c. algal mats and stromatolites d. hydrothermal vents and stromatolites
The similarity in appearance between bees and wasps is an example of ________
a. competitive exclusion b. interspecific competition c. mutualism d. mimicry e. resource partitioning
Which of the following statements is false?
a. A heart will stop beating when the nerves to the heart are severed. b. Some cardiac muscle cells are self-excitatory. c. The pacemaker of the heart is the sinoatrial node. d. Cardiac muscle cells have numerous gap junctions on their sides to allow rapid communication. e. Cardiac muscle cells of the two ventricles contract essentially in unison.
There are about ____ identified species of vertebrates
a. 2,000 b. 5,000 c. 30,000 d. 50,000 e. 125,000