Biology Qs?

Question

Classification based on DNA hybridization is based on the idea that
a. closely related organisms have the same number of chromosomes
b. closely related species can form hybrid offspring
c. DNA of closely related organisms stick together better than that of unrelated organisms
d. distantly related organisms have homologous DNA
e. none of these

How did Darwin's theory of evolutionary theory change the significance of taxonomic categories of organisms?
a. theory of natural selection had no affect on taxonomy
b. taxonomic categories are now considered to reflect phylogeny
c. Darwin described the domains we use today
d. relationships among organisms became clear and many species were renamed
e. taxonomists no longer considered anatomical similarities in classifying organisms

Mychorrhizae are
a. root parasites
b. nitrogen fixers
c. root-dwelling mutualists
d. photosynthetic nodules
e. bread molds

Answer 1

1. C.
2. B.
3. C.

Answer 2

1. C.
2. B.
3. D.