Asexually produced fungal spores are ______, whereas fungal cells produced sexually, by the fusion of two mating strains, are _______
a. haploid; dikaryons
b. haploid; diploid
c. diploid; dikaryons
d. diploid; haploid
e. dikaryons; diploid
A; The only diploid cells in fungi are the zygotes, which immediately undergo meiosis. The zygote is produced by the fusing of the two nuclei of the heterokaryon, the binucleate cells produced by mating. Spores are typically haploid.
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The photosynthetic activity of cyanobacteria takes place in their:
A. thylakoids B. mitochondria C. pili D. gas vesicles E. magnetosomes
The intertwined mass of hyphae that constitutes the body of a mold is a ________.
A. stem B. stock C. mycelium D. rhizoid E. bud
Generation time refers to:
a. the number of years it takes for a generation to die. b. the amount of time required to replicate the DNA in a cell. c. the time it takes to complete one cell cycle. d. the time required for an individual in a species to achieve sexual maturity. e. the time it takes for a new mitotic spindle to form.
In order to show that DNA in cell extracts is responsible for genetic transformation in pneumococcus, important corroborating evidence should indicate that _______ also destroy transforming activity.
A: enzymes that hydrolyze DNA B: enzymes that hydrolyze RNA C: enzymes that hydrolyze polysaccharides D: boiling E: enzymes that hydrolyze proteins