Macrophages release (bradykinin/histamine/prostaglandin) in response to microbes and thereby contribute to acute inflammation
What will be an ideal response?
prostaglandin
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The time it takes for half of a radioisotope's
atoms to decay a. cannot be calculated. b. is used to construct the geologic time scale. c. is its half-life. d. is the same for uranium 238 and carbon 14. e. is all of these
Viral infections are not considered a risk factor for autosomal trisomy because a virus cannot affect human
chromosome arrangement. a. True b. False
As predator and prey species acquire new adaptations to help them survive the constant "arms race" between them, what evolutionary phenomenon is occurring?
A) Artificial selection B) Competition C) Coevolution D) Sexual selection E) Genetic drift
What is generally true about essential elements and living organisms?
a. Although all forms of life require iron, other elements are required only by certain species b. All organisms require 25 of the 92 naturally occuring elements to survive c. Given their low concentration in nature, the toxicity of some elements is generally not a factor in the evolution of biological communities d. The elements carbon, hydrogen, nitrogren and and oxygen make of 20-25% of living mass.