______ is the presence of small numbers of viruses in circulating blood
Fill in the blank(s) with the appropriate word(s).
Viremia
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What are the genes that code for positive cell-cycle regulators, like Cdk, called?
a. oncogenes b. tumor suppressor genes c. proto-oncogenes d. mutated genes
Why is the process of nitrogen fixation by prokaryotes essential?
a. It removes nitrogen from the soil. b. It converts atmospheric nitrogen to a non-toxic form. c. It provides nitrogen sources for plants and animals. d. It provides an energy source for photosynthesis. e. It allows for the breakdown of complex macromolecules.
Low sperm ____________________ results in the inability of sperm to move through cervical mucus and reach the
egg in the oviduct Fill in the blank(s) with the appropriate word(s).
Under what conditions does one expect a 1:1:1:1 ratio?
What will be an ideal response?