Epithelial cells are specialized for all the following functions EXCEPT
A. protection
B. contraction
C. secretion
D. filtration
Ans: B. contraction
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Which one of the following statements about viruses is incorrect?
A. Most viruses use cellular machinery to replicate their genetic material. B. The genomes of viruses are enclosed in a protein coat and occasionally a lipid bilayer envelope. C. Viruses possess the ability to harness energy from the environment. D. Viruses are valuable tools in biological research. E. Some types of viruses employ replicative cycles involving the integration of their genomes into the genome of the host organism.
In eastern Oregon, the mycelium of a single individual Armillaria ostoyae, a member of the fungal
phylum ____, covers an area equivalent to 1665 football fields (nearly 6000 m across).
a. Glomeromycota b. Basidiomycota c. Chytridiomycota d. Zygomycota e. Ascomycota
Which of the following pertains to both tetanus and foodborne botulism?
A. They are caused by enterotoxins of the pathogen. B. They occur when endospore-contaminated soil enters deep wounds. C. Nausea and diarrhea are symptoms. D. An exotoxin blocks acetylcholine release. E. Treatment involves antitoxin therapy.
Green algae are assumed to be ancestors of plants because
A) green algae are almost exclusively marine. B) green algae make chitin and laminarin. C) the fossil ancestors have been discovered. D) lignin is known to occur in some green algae. E) green algae make cellulose and starch.