Bacterial biofilms stimulate the immune system differently than planktonic bacteria.
Answer the following statement true (T) or false (F)
True
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The physiologist J. Soum surgically sealed off an air sac of a pigeon and injected carbon monoxide into it. What did he observe and conclude from this experiment?
A. The bird died demonstrating the toxicity of this gas. B. The bird was fine, demonstrating this gas is not actually toxic. C. The bird died, indicating diffusion of gases across the air sac into the blood. D. The bird showed no ill effects, indicating diffusion of gases from the air sac into the blood. E. The bird showed no ill effects, indicating gases do not diffuse from the air sac into the blood.
In this type of immunity, the response is
immediate, the antigen is detected by a fixed set of receptors, and does not persist. This type of immunity is
a. innate. b. adaptive. c. antibody-mediated d. cell-mediated. e. more than one of these
The iron-sulfur world hypothesis suggests that organic molecules formed near:a
volcanoes. b. sulfur pools. c. pools of water. d. hydrothermal vents. e. low atmosphere clouds
Genetics is the study of ________
A) mutation and recession B) transcription and translation C) replication and recombination D) inheritance and variation E) diploid and haploid