Spoilage of canned foods stored at high temperatures, accompanied by gas production, is
A) thermophilic anaerobic spoilage.
B) flat sour spoilage.
C) spoilage by mesophilic bacteria.
D) caused by acid-tolerant fungi.
E) putrefactive anaerobic spoilage.
A
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Which of the following arose first?
a. animals b. archaea c. fungi d. protists e. plants
If you transfuse type AB blood into a patient with type A blood, the patient will raise antibodies against the B antigen on the donor's blood, but will not raise antibodies against the A antigen. Why not?
A. B and T cells that recognize the A antigen will have been removed by clonal deletion. B. Antibodies that recognize the A antigen will have been removed by the spleen. C. Antibodies that recognize the A antigen will have been removed by the bone marrow. D. Macrophages will not present the A antigen to T cells. E. Recombination of the gene for antibodies cannot produce self-reactive clones.
6 general features of synovial joints
What will be an ideal response?
All of the following are adaptations of black-tailed prairie dogs except:a
digestive tracts modified to easily digest seeds and leaves of grasses. b. omnivores. c. live underground. d. hibernate throughout the winter. e. live in large social groups.