Biodegradation of oil in soil is difficult due to a lack of ________, which is very expensive to introduce into the sediments.
A. phosphorous
B. carbon
C. nitrogen
D. oxygen
Answer: D
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Which of the following is NOT usually present during the icteric stage of viral hepatitis?
a. Hepatomegaly b. Elevated serum liver enzymes c. Esophageal varices d. Lighter-colored stools
Epitopes or antigenic determinants
A. are parts of the antibody molecule. B. are T cell receptors. C. are a portion of antigen recognized by antibody. D. may be approximately 10-25 amino acids in length. E. are a portion of antigen recognized by antibody AND may be approximately 10-25 amino acids in length.
In a monocot seed, what is the fate of the
coleoptile?
a. it becomes the stem b. it becomes the root c. it stops growing d. it becomes the cotyledon e. it becomes the hypocotyl
_____ are densely staining, highly compacted, and transcriptionally inactive regions of chromatin
a. Homochromatin b. Heterochromatin c. Histone-dependent chromatin d. Primary chromatin e. Euchromatin