ATP binding to myosin causes which of the following?
a. myosin binds to actin
b. ADP and phosphorus disassociate
c. myosin releases actin
d. the filaments move toward the M line
c. myosin releases actin
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Carbohydrates are stored in the roots, but they may also be released into the surrounding soil, where they feed the microbial community
A. true B. false
When comparing the genetic characteristics between embryonic and adult stem cells, embryonic stem cells
A. are collected from the testes and ovaries, while adult stem cells are collected from other tissues. B. are produced naturally in human development, while adult stem cells are from cloning. C. There is no real genetic difference between embryonic and adult stem cells, except how they were collected. D. can't differentiate into any specialized cells, while adult stem cells can. E. can differentiate into any specialized cells, while adult stem cells can't.
Which of the following statements regarding enzymes is FALSE?
A) Enzymes are proteins that function as biological catalysts. B) Enzymes are highly specific for the molecules to which they attach. C) The activity of enzymes can be regulated by factors in their environment. D) Enzymes provide energy for the reactions they catalyze. E) An enzyme may be used many times for the same specific reaction.
The geographic isolation of a population from other members of the species and the subsequent evolution of reproductive barriers between it and the parent species describes ________ speciation
A) punctuated B) sympatric C) allopatric D) biogeographic