Data collected to date indicate that
A) humans and marine mammals cannot be infected by the same pathogens.
B) marine mammals do not get infectious diseases.
C) new species of bacteria will not be discovered in wild animals.
D) marine mammals don't have an immune system.
E) None of the answers is correct.
E
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Phagocytosis (Phagotrophy) is:
A. attack of cells by bacteriophages B. the phases through which cells pass during division C. the disintegration of a cell D. the attachment of protist cells to a substrate E. the capture of food particles by a cell
Viruses that enter an inactive phase in which the host cell replicates and passes on a bacteriophage
DNA for generations before the phage becomes active and kills the host are called
a. virulent bacteriophages. b. bacteriophages. c. temperate bacteriophages. d. phages. e. avirulent bacteriophages.
A neomorphic mutation could result in an allele that
A) produces no gene product. B) produces a nonfunctional gene product. C) produces a novel protein that gives rise to a new phenotype. D) produces mutant protein subunits that aggregate with wild-type subunits, inactivating them. E) produces an altered protein that functions more efficiently than the wild-type protein does.
What is an antibiotic?
A) A drug used to kill or inhibit bacteria B) A drug used to kill bacteria and viruses C) A drug used to kill viruses D) A disinfectant used on skin