During the process of splitting water during photosynthesis, the first cyanobacteria released _____ into the
atmosphere.
a. oxygen gas
b. infrared heat
c. hydrogen gas
d. carbon dioxide
e. photons of light
a
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Which of the following is produced directly by the stem apical meristem (SAM)?
A. protoderm B. vascular cambium C. cork D. pith E. bark
An example of the utility of gene expression profiling in a clinical situation is
A) finding that a child has inherited a certain genotype. B) identifying genes with aberrant expression levels in cancers likely to spread. C) determining whether a medical condition is inherited or not. D) replacing a gene bearing a mutation with a wild type version in the affected tissue.
The almost complete loss of the American chestnut tree to the chestnut blight fungus had ____ ecological impact on
the moderately diverse Appalachian woodlands of which it was formerly a part. a. little b. great c. moderate d. undetectable e. detectable
Eukaryotic pre-mRNA molecules are modified
A. at the transcription bubble. B. inside the nucleus. C. in the cytoplasm. D. as they pass through the nuclear membrane. E. at the ribosome.