Which is the correct order for the three lines of defense?
1.innate immunity, physical/chemical/mechanical barriers, adaptive immunity
2.physical/chemical/mechanical barriers, adaptive immunity, innate immunity
3.physical/chemical/mechanical barriers, innate immunity, adaptive immunity
4.innate immunity, adaptive immunity, physical/chemical/mechanical barriers
3
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Every protein is assembled on ____ according to instructions that are copied from ____
a. mRNAs; tRNAs b. tRNAs; mRNAs c. ribosomes; mRNA d. tRNAs; DNA e. ribosomes; DNA
Which of the following statements is NOT TRUE?
a. Photons are packages of solar energy. b. Each photon consists of a fixed amount of energy. c. The least energetic photons travel in longer wavelengths. d. Photons with different energy levels are perceived as exhibiting different colors. e. Photons of visible light have wavelengths longer than 750 nanometers.
Which of the following is an exergonic reaction?
a. folding laundry b. synthesizing a protein c. burning wood for a campfire d. building a tower out of blocks
When modeling foraging behavior, biologists assume that food occurs only in ___________.
a. kitchens b. soil c. oceans d. patches e. forests f. I don't know the answer