To establish itself in a host, a microbe must:
a. survive immune system defenses
b. utilize a portal of entry
c. be able to adhere to host tissue
d. damage and destroy host tissue
e. produce toxins and exoenzymes
a. survive immune system defenses
b. utilize a portal of entry
c. be able to adhere to host tissue
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Define a species cluster and provide examples
What will be an ideal response?
Character changes in molecular sequences are generated by
a. insertions. b. deletions. c. substitutions. d. base pairing. e. insertions, deletions, and substitutions.
Which hormone is responsible for the development of secondary sex characteristics in females?
a. estrogen only b. progesterone only c. estrogen and progesterone d. oxytocin
The fact that every organism continuously exchanges chemicals and energy with its surroundings indicates that organisms ________
A) are open systems B) are closed systems C) have tightly controlled thermoregulation D) osmoregulate