Which of the following is considered to be a "clean" energy source?
A. geothermal energy
B. burning coal
C. nuclear power
D. burning natural gas
Answer: A
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In order for a root to branch, new apical meristem must form from the ____ , a single layer of cells inside the endodermis of the root
Fill in the blank with the appropriate word.
In eukaryotes, post-transcriptional control of gene regulation may involve
A) alternative mRNA splicing. B) control of nuclear export of mRNAs to the cytoplasm. C) differential mRNA degradation. D) gene amplification and methylation. E) alternative mRNA splicing, control of nuclear export of mRNAs to the cytoplasm, and differential mRNA degradation.
Which of the following autoimmune diseases can potentially be avoided by preventing or completely curing a Streptococcus infection?
A. HIV B. Systemic lupus C. Rheumatoid arthritis D. Rheumatic fever
Buffers
A. contain salts of weak acids or weak bases. B. release hydrogen ions when a base is added to the solution. C. keep hydrogen ion concentration and pH within a narrow range. D. include phosphate, protein, and bicarbonate systems. E. All of these are correct statements.