Endemic means a species ____.
A. evolved in one geographic region and lives nowhere else
B. is on its way to extinction
C. feeds only on one type of food
D. is extinct in the wild
E. is completely extinct
Answer: A
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Where does the Calvin cycle occur?
a. thylakoid membrane b. thylakoid lumen c. stromal lamellae d. cytosol e. stroma
Beadle and Tatum irradiated Neurospora and initially grew the mutant strains on complete medium. How were they
able to determine the type of mutation for each strain? a. By growing the mold on a complete medium with extra vitamins and nutrients b. By growing the mold on minimal media supplemented with different combinations of amino acids and vitamins c. By growing the mold in its diploid form to see which traits were masked d. By comparing Neurospora to other species of mold e. By observing the marked differences in morphology between the different strains
Viruses are ________ -coated fragments of DNA or RNA.
Fill in the blank(s) with the appropriate word(s).
Which of the following are permanently differentiated cells?
A) Stem cells B) Most brain cells C) Bone marrow cells D) Newly formed daughter cells