An infectious circular piece of RNA that can infect plants is called a ________.

A. virus
B. prion
C. viroid
D. capsid


Answer: C

Biology & Microbiology

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Who is most noted for being a Greek naturalist who proposed the function of gills in fish?

a. Plato b. Aristotle c. Pliny the Elder d. Sophocles

Biology & Microbiology

Which of the following chemicals is used to

induce polyploidy?

a. colchicine b. ethylene c. gibberellin d. cytokinin e. auxin

Biology & Microbiology

Neurospora is an ideal organism to study the effects of genetic mutations because of several reasons. What is one of

these? a. Neurospora is a small mammal. b. Neurospora grows as a diploid organism. c. Neurospora requires a medium supplemented with only a few nutrients that it cannot manufacture on its own. d. Neurospora mutant strains that cannot make a particular amino acid can still grow if that amino acid is added to the growth medium. e. Neurospora contains homologous chromosomes that are easily viewed with a light microscope

Biology & Microbiology

Most of the dry weight of a microbial cell is from ________.

A. water B. organic compounds C. salts D. minerals E. inorganic compounds

Biology & Microbiology