Immune responses triggered by ________ differences cause organ transplant rejection
a. PAMP
b. pattern recognition receptor
c. human leukocyte antigen
d. immune-based tyrosine-activation motifs
Answer: C
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What were the conclusions of Gibson’s experiments with small mammal populations?
a. Fragmentation increases biodiversity. b. Fragmentation leads to extinction of native populations. c. Fragmentation does not affect small mammal populations. d. Fragmentation has the same effect on large and small mammal populations. e. Fragmentation has more impact in aquatic than in terrestrial habitats.
Lignin is a polymer composed of monomers derived from amino acids
____________________ Indicate whether the statement is true or false.
A test tube filled with sugar and yeast made a balloon fill with gas. what is a valid conclusion?
a) yeast cells use sugar to make CO2 by anaerobic respiration b) yeast cells use water to produce CO2 through photosynthesis c) yeast cells use O2 to make CO2 through anaerobic respiration
You have been growing some animal cells in culture. The cells grow well for several weeks, and then don't seem to grow at as well. You conduct some tests and determine that there is a lot of lactic acid in the culture fluid. Which of the following is the most likely explanation for the poor condition of the cells?
A. there is too much glucose in the culture fluid B. there is not enough glucose in the culture fluid C. there is too much oxygen in the culture fluid. D. there is not enough oxygen in the culture fluid.