The A bands in skeletal muscle are composed of ____
a. discs to which thin filaments are anchored
b. stacked thick filaments along with the parts of thin filaments that overlap both ends
c. thin filaments but no thick filaments
d. thick filaments but no thin filaments
e. stacked thin filaments along with parts of thick filaments that overlap both ends
ANSWER: b
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Why doesn't inbreeding depression, by itself, cause evolution?
A) It decreases the population's average fitness. B) It limits gene flow. C) It does not change the population's allele frequencies. D) It increases homozygosity. E) It violates the Hardy-Weinberg assumptions.
Four of the following characteristics are required for the life of an individual organism to continue. Which is the
exception?
a. to maintain chemical uniqueness and organization b. to respond to stimuli c. to possess a genetic program to control cell processes d. to reproduce e. to evolve
There has been and remains great interest in developing safe and effective herbicides. In some situations, it would be desirable to have a herbicide that killed a wide variety of different plants,
but in other cases it would be best to have a herbicide that was much more selective. a) What plant activity would you target to kill the widest variety of plants? b) What plant activity would you target to kill C4 plants? c) What plant activity would you target to kill CAM plants? Be as specific as possible. What will be an ideal response?
Nondisjunction is viewed as a major cause of aneuploidy
Indicate whether the statement is true or false