Most prokaryotes
a. are rare in nature.
b. are easily cultured in the laboratory.
c. can’t be cultured.
d. are large enough to see with the naked eye.
e. are none of these.
Answer: c
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Rank the elements carbon, sodium, calcium, and iodine in order of _____________. decreasing number of valence
electrons decreasing number of energy shells/levels decreasing number of protons decreasing number of electrons greatest abundance in living organisms
Which of the following lists the correct order of tracheal system structures, from most external to most
internal?
a. spiracles, tracheae, tracheal branches, tracheoles b. tracheoles, tracheae, tracheal branches, spiracles c. tracheoles, tracheal branches, tracheae, spiracles d. spiracles, tracheal branches, tracheae, tracheoles e. spiracles, tracheoles, tracheae, tracheal branches
The aorta is classified as a(n) ____
a. artery
b. arteriole c. capillary d. venule e. vein
A particular haploid strain of yeast contains a temperature-sensitive mutation in its cdc2 gene resulting in no functional Cdc2 protein at the nonpermissive temperature
At the nonpermissive temperature, each of the following events would fail to occur at the appropriate cell cycle stage except A) replication of DNA. B) fragmentation of the nuclear envelope. C) condensation of chromosomes. D) appearance of the mitotic spindle. E) prevention of fusion of chromosome ends.