The nuclear envelope is perforated by _______________________
a. plasmodesmata
b. gap junctions
c. nuclear pores
d. none of the above
c
Biology & Microbiology
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Which structures found in ferns are lacking in mosses?
a. spores b. gametophytes c. xylem d. sporophytes e. flagellated sperm
Biology & Microbiology
When an allele can produce a range of phenotypes, its expression is said to be
a. clearly established. b. variable. c. codominant. d. incompletely dominant. e. incompletely penetrant.
Biology & Microbiology
Which infectious agent produces explosive diarrhea and foul-smelling belches?
a. rotavirus b. Giardia intestinalis c. H. pylori d. intestinal candida e. influenza
Biology & Microbiology
Which phylum of nonvascular plants has about 10 000 known living species, including those in the genus Sphagnum?
a. Pterophyta b. Hepatophyta c. Lycophyta d. Bryophyta
Biology & Microbiology