Fungi differ from bacteria in that fungi
a. Have cell walls.
b. Have DNA.
c. Have a nucleus.
d. Spoil food.
e. Are cellular.
Ans: c. Have a nucleus.
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The process in which related DNA sequences from two different sources are exchanged is called
A) transduction. B) phage conversion. C) reversion. D) homologous recombination.
Each antigen has one antigenic determinant site or epitope.
Answer the following statement true (T) or false (F)
A mutation in a collagen gene is likely to affect the phenotype because
A) it is extremely rare. B) during meiosis, the chromosome that bears the mutation is more likely to enter a gamete than the chromosome that carries the wild type allele. C) collagen has a very precise three-dimensional structure, so nearly any disruption alters the overall conformation. D) people who use cosmetics with collagen silence collagen genes.
Species that exhibit repeated reproductive cycles are said to be semelparous. Indicate whether the statement is true or false