Most animal hormones _____
A) are produced by endocrine glands
B) are lipid-soluble molecules
C) are carried to target cells in the blood or hemolymph
D) are protein molecules
E) elicit the same biological response from all of their target cells
Answer: C
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Some bacteria have a higher incidence rate of thymine dimer mutations following exposure to UV light than others. What might be going on here to lead to this outcome?
A. They may simply have a higher proportion of T nucleotides next to each other in their DNA sequences than other bacteria, leading to more possible dimers being formed. B. They may have a stronger expression of photoreactivation enzymes, leading to more thymine dimers being formed and retained. C. They may have a weaker expression of photoreactivation enzymes, leading to more thymine dimers being formed and retained. D. They may simply have a higher proportion of T nucleotides next to each other in their DNA sequences than other bacteria, leading to more possible dimers being formed AND they may have a stronger expression of photoreactivation enzymes, leading to more thymine dimers being formed and retained. E. They may simply have a higher proportion of T nucleotides next to each other in their DNA sequences than other bacteria, leading to more possible dimers being formed AND they may have a weaker expression of photoreactivation enzymes, leading to more thymine dimers being formed and retained.
Gonorrhea is a disease that may be
A. zoonotic. B. pandemic. C. syndemic. D. asymptomatic.
Positive feedback systems restore homeostasis. Indicate whether the statement is true or false
Which of the following virulence factors is specifically involved in helping an organism to physically spread throughout the body?
A) hyaluronidase B) endotoxins C) hemolysin D) siderophores