Random segregation of chromosomes (by itself) means that a particular daughter cell
a. has some paternal chromosomes and some maternal chromosomes.
b. has only paternal chromosomes.
c. has only maternal chromosomes.
d. has chromosomes containing genes from the paternal and maternal chromosomes.
e. has some paternal chromosomes and some maternal chromosomes and has chromosomes
containing genes from the paternal and maternal chromosomes.
A
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A researcher is looking for met- strains. He/she compares two plates. One plate has colonies growing
on complete medium. The other plate has colonies growing on methionine deficient medium. How can the researcher determine which colonies are met-?
a. The colonies growing on the methionine plate are met-. b. met- colonies grow on the complete medium but do not grow on the plate lacking methionine. c. We cannot determine which colonies are met- because we do not have enough information. d. Only the colonies growing on the complete medium are met-. e. met- colonies grow on the plate lacking methionine but do not grow on the complete medium.
Approximately 200 of the 300 native species of fish in Lake Victoria haven't been observed since the 1960s and are therefore probably extinct
Using the estimate of the background extinction rate, how many species of Lake Victoria fish would one expect to have naturally become extinct during the last 50 years? A) less than 1 B) 1-10 C) 11-50 D) more than 50
Which kingdom would include an organism that is multicellular and makes its own food?
A) kingdom Animalia B) kingdom Fungi C) kingdom Plantae D) kingdom Protista
Which of the following is not a characteristic of plasma-membrane carbohydrates?
a) all face outward into the extracellular space b) some are linked to lipids c) all float freely within the membrane d) more than 90% of them are linked to proteins