The term eukaryotic means ____
a. having many nuclei
b. before the nucleus
c. having a true nucleus
d. not having a nucleus
e. not having DNA
ANSWER: c
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Turgor is most directly related to the plant cells'
A. total water potential. B. pressure potential. C. solute potential. D. osmosis. E. gravity potential.
Seed plants are _____
a. flowering plants d. spermatophytes b. conifers e. tracheophytes c. gymnosperms
Suppose that a homeotic gene from Drosophila is introduced into an Arabidopsis embryo that has a pre-existing mutation in one of its homeotic flower genes. What effect would you expect and why?
A) rescue (or negating) of the phenotype of the mutant because the fly Hox gene supplies the missing protein B) correction of the sequence in the mutant by recombination with the Drosophila gene sequence C) expression of the Drosophila homeotic gene correcting the mRNA of the mutant plant D) a mixture of roughly equal numbers of Drosophila and plant gene product, producing an intermediate phenotype E) no effect, because Hox genes are different from MADS box genes
What is the most diverse bacterial lineage?
a. Proteobacteria b. Chlamydias c. Cyanobacteria d. Gram-positive bacteria e. Spirochetes