Sarah is a little underweight for her size. As a result, her leptin levels will be __________ if
she gained a bit more weight.
a. higher than
b. lower than
c. the same as
d. either higher than or the same as
B
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Hot sulfur-rich environments associated with terrestrial sulfur-rich springs are called
A) acid-mine drainage. B) hydrothermal vents. C) solfataras. D) terrestrial volcanoes.
Through a sequence similarity search, a researcher identifies a gene whose predicted protein product has a putative
function of a photosynthesis-enhancing enzyme. Which experimental method could be performed to verify this function?
a. PCR b. an assay measuring photosynthetic productivity c. identification of signature genes d. DNA microarray e. gene knockout
When DNA is imprinted, the methylation pattern is preserved
Indicate whether the statement is true or false.
Which period is the most recent?
a. Triassic b. Silurian c. Devonian d. Permian e. Cambrian