Which is false about Rapid Eye Movement (REM) sleep?
-It is the last sleep state in the adult's 90 minute sleep cycle
-One's EEG shows brain activity similar to wakefulness
-The amount of REM sleep that takes place in a 90 minute sleep cycle remains constant throughout the night (meaning that in each stage, 20% of sleep is REM)
-Most dreaming activity is associated with this stage
The amount of REM sleep that takes place in a 90 minute sleep cycle remains constant throughout the night (meaning that in each stage, ~20% of sleep is REM)
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Mutations are _____________.
A.usually weeded out of a population. B.usually neutral. C.usually beneficial. D.necessary for evolution. E.usually detrimental.
The placement of the amino acid during translation is determined by the
A. DNase, which transcribes both molecules. B. complementarity of the codon-anticodon. C. sequence of nucleotides at the 5' end of the tRNA. D. secondary structure of the newly forming protein.
How does scientific information in peer-reviewed journals differ from that in newspapers?
A) Information is more technical; readers usually require a background in the field in order to understand the article. B) The article is written by a reporter, not a researcher. C) Articles often include political, ethical, and economic ramifications of the scientific findings. D) Information is less in-depth and easily understood by the average reader. E) Information is not approved by other scientists before its publication.
On a scientific expedition into new territory, you discover a previously undescribed organism living within the very
hot environment of a geyser. This organism has a cell wall, is single celled, heterotrophic, and has no true nucleus. In what kingdom would you most likely place this organism and why? What will be an ideal response?