Humans belong to which class of animals?
A) Bacteria
B) Archaea
C) Eukarya
D) vertebrates
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Invasion is the ability of a pathogen to enter into host cells or tissues, spread, and cause disease
Indicate whether the statement is true or false.
Variation in which of the following is not a major mechanism for regulation of blood pressure?
1.cardiac output 2.constriction of blood vessels 3.pacemaker signal strength 4.total blood volume
Which statement is true?
a. The hydrogen bonding of cytosine to guanine is an example of complementary base pairing. b. Adenine always pairs up with guanine in DNA, and cytosine always teams up with thymine. c. Each of the four nucleotides in a DNA molecule has the same nitrogen-containing base. d. When adenine base pairs with thymine, they are linked by three hydrogen bonds. e. In the DNA of all species, the amount of cytosine never equals the amount of guanine.
Monoclonal antibodies:a
have been linked as causative agents in some types of cancer. b. are only produced by harvesting B cells from mice exposed to particular antigens. c. include hCG, a component of commonly used home pregnancy tests. d. are very specific for their target antigen, but are somewhat difficult to purify. e. are produced by millions of genes.