The somatic division of the peripheral nervous system (PNS) controls skeletal muscles
Indicate whether the statement is true or false
TRUE
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In the United States, most common exposure to Clostridium botulinum and its toxins occurs through __________.
Fill in the blank(s) with correct word(s).
Mitochondria arose from an endosymbiotic relationship between a eukaryotic cell and an aerobic bacteria. Which statement supports this theory?
a. Fossilized mitochondria are older than the oldest fossilized eukaryotes. b. Mitochondria can produce ATP outside of a eukaryotic cell. c. A mitochondrion has its own DNA in the form of a single circular chromosome, like bacteria. d. A mitochondrion has a only one outer membrane. e. A mitochondrion can survive indefinitely when removed from a eukaryotic cell.
A phospholipid molecule contains a “head” portion that ____
a. is hydrophilic b. is derived from cholesterol c. contains two fatty acid chains d. is similar in structure to a triglyceride e. forms a hydrophobic barrier
Explain how a mutant CC-CKR5 allele offers protection from HIV infection. What will be an ideal response?