A lipid membrane is present in which of the following?
A. naked viruses
B. enveloped viruses
C. prions
D. viroids
E. both prions and viroids
Answer: B
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Most viruses form a capsid around their nucleic acid core. This capsid is composed of
A. proteins. B. monosaccharides. C. glycoproteins. D. lipoproteins.
What comprises about half of our non-coding DNA?
A. Introns D. Repeating sequences B. Promoter regions E. Single nucleotide polymorphisms C. Exons
Both eyes have an optic disk. When an image is focused on the optic disk, it cannot be "seen."
Indicate whether the statement is true or false
If a species is absent from a particular region, which are the reasonable explanations for its absence? Check all that apply.
A. It evolved elsewhere and never dispersed to the region in question. B. It was once found in the region in question, but was eradicated by humans. C. It was once found in the region in question, but became extinct there due to climactic changes. D. It was once found in the region in question, but migrated to other regions