Lakes become eutrophic by
A. accumulation of organic matter.
B. loss of organic matter.
C. circulation of water in the lake.
D. free exchange of water with outside sources.
E. an increase in the number of organisms.
A. accumulation of organic matter.
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The endodermis
(a) is the outer covering of the root. (b) is part of the vascular tissue. (c) contains the Casparian strip, which regulates the movement of substances. (d) is none of the above.
Which is the correct sequence of events for protein degradation in eukaryotes?
A. ubiquitin binds target protein ? protein unfolds and enters proteasome ? protein directed to proteasome ? protein digested ? amino acids are released and recycled B. ubiquitin binds target protein ? protein directed to proteasome ? protein unfolds and enters proteasome ? protein digested ? amino acids are released and recycled C. protein directed to proteasome ? ubiquitin binds target protein ? protein unfolds and enters proteasome ? protein digested ? amino acids are released and recycled D. protein directed to proteasome ? protein unfolds and enters proteasome ? ubiquitin binds target protein ? protein digested ? amino acids are released and recycled E. protein directed to proteasome ? protein unfolds and enters proteasome ? protein digested ? ubiquitin binds target protein ? amino acids are released and recycled
Which type of skeleton is found in earthworms?
a. Exoskeletons b. Axial skeleton c. Endoskeletons d. Appendicular skeleton e. Hydrostatic skeleton
After infecting the cell, HBV's gapped DNA is released into the nucleus where host ________ enzymes fill the gap and seal the nick, yielding a covalently closed, circular DNA.
Fill in the blank(s) with the appropriate word(s).