What type of speciation is most common in animals?
a. hybridization
b. allopatric
c. allopolyploidy
d. sympatric
e. paedomorphosis
B
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During mitosis, if all of the chromosomes in a diploid cell fail to separate and instead segregate into one daughter cell, the result will be what?
A) one monoploid daughter cell and one triploid daughter cell B) one 2x-1 daughter cell and one 2x+1 daughter cell C) two 2x daughter cells D) only one tetraploid daughter cell
The risk for Down syndrome increases in situations where the
A. mother is 20?29 years old. B. father is 35?50 years old. C. mother is 35?45 years old. D. father is 20?29 years old. E. both parents are 30?35 years old.
Cells grown in culture form a/an ________.
A. monolayer B. bilayer C. plaque D. aggregate
The structural level of a protein least affected by a disruption in hydrogen bonding is the _____
A) primary level B) secondary level C) tertiary level D) quaternary level E) All structural levels are equally affected by a disruption in hydrogen bonding.