After growth in tissue culture, the infected cells lyse and the virus may be harvested from
A.
the lysate, the liquid supernatant after centrifugation.
B. the remainder.
C. the quantal layer.
D. the monolayer.
A
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A cell cluster with both algal and hyphal cells that is used for asexual reproduction in lichens is called a(n) ____
a. soredium b. arbuscule c. thallus d. sporangium e. haustorium
In the giant kelp the large thallus is the ____ life stage
a. sporophyte b. carpospore c. gametophyte d. zygote e. tetrasporophyte
What step occurred first in the evolution of life?
a. formation of protein-RNA systems b. formation of lipid spheres c. formation of membrane-bound protocells d. formation of ATP e. spontaneous formation of lipids, proteins, carbohydrates, and nucleotides
Paleontologists have pieced together from fossils the evolution of the whale from:a
aquatic reptiles. b. four-legged, land dwelling mammals. c. sharks. d. porpoises. e. extinct aquatic birds.