Cartilage injuries do not repair themselves because ________.
a. All of these choices are reasons cartilage injuries do not repair themselves
b. cartilage does not receive nutrients very easily
c. cartilage does not contain blood vessels
d. None of these are reasons as cartilage does heal itself.
e. cartilage does not divide in adults
a
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Point mutations in the DNA sequence don't cause:
A. silent mutations. B. missense mutations. C. nonsense mutations. D. frameshift mutations. E. transversion mutations.
________ are the most diverse group of fungi
a. Glomeromycetes b. Ascomycetes c. Chytridomycetes d. Basidiomycetes e. Zygomycetes
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.
Cutting DNA with a particular restriction enzyme produces DNA fragments that can be separated by enzymes.
a. true b. false