Many fully differentiated plant cells are totipotent, meaning that they ____
a. will grow roots if they touch the ground
b. will perform photosynthesis if exposed to sunlight
c. can fertilize an egg
d. have the potential to form a whole, fully-functional plant
e. can undergo meiosis
ANSWER: d
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If you are a human geneticist looking for an ideal population in which to map disease genes, which of the following characteristics would help the mapping study?
A) small family sizes with well-known genealogies B) a population where all members have the disease C) large family sizes with little known genealogies D) large family sizes with well-known genealogies
Genetic disorders such as Tay-Sachs disease, Bloom syndrome, Gaucher disease, and Canavan disease are more common in Ashkenazi Jewish populations because
A) spontaneous mutations occur more frequently in this group. B) the gene pool has been highly variable over thousands of years. C) microevolution has not influenced this culture. D) their history includes several population bottlenecks.
Diversity refers to:
a. the abundance of species. b. the biomass of organisms. c. the abundance and biomass of organisms. d. the number of species. e. the number of individuals of a species.
Four of the five answers listed below are carbohydrates. Select the exception
a. glycerol b. cellulose c. starch d. sucrose e. glycogen