Which of the following is a major risk factor for developing diabetes?
a. geographic location
b. obesity
c. gender
d. exposure to excessive sunlight
e. vegetarian diet
B
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Allergens induce ____ cells to secrete an overabundance of ____ antibodies
a. CD4+ T; IgA b. B; IgE c. dendritic; IgG d. CD8+ T; IgE e. B; IgG
What is not an adaptation to avoid overheating and desiccation? a. A barnacle trapping water inside with calcareous plates
b. A mussel closing its shell at high tide. c. A crab simply moving towards water. d. An anemone covering itself with shell fragments.
When one species actively prevents another from accessing a resource, it is called:
a. interference competition b. exploitative competition c. scavenging d. interspecific competition e. predation
An animal with a brain and a single ventral solid nerve cord is the
A. planarian. B. cat. C. hydra. D. earthworm. E. octopus.