In a class field trip, you scrape what looks like an organism off of a stream rock. Through the semester, with chemical analysis and electron microscopes, you determine that the cell has DNA, RNA, ribosomes, a cell membrane, and cytoplasm. This helps you determine that
A. this is an unusual plant that you collected from the stream.
B. this organism you collected is in the Eukarya domain.
C. this organism you collected is in the Bacteria domain.
D. this organism you collected is in the Archaea domain.
E. this is an organism with cells having common features with all life.
E. this is an organism with cells having common features with all life.
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Messenger RNA molecules have a nontranslated sequence called the ________ , which is located downstream of the termination codon.
Fill in the blank(s) with the appropriate word(s).
Compare a pseudocoelom to a coelom.
A. A coelom is completely enclosed by mesoderm whereas a pseudocoelom has an outer covering of mesoderm and an inner one of endoderm. B. A pseudocoelom is completely enclosed by mesoderm whereas a coelom has an outer covering of mesoderm and an inner one of endoderm. C. The coelom is enclosed by ectoderm and the pseudocoelom is enclosed by endoderm. D. The pseudocoelom is enclosed by ectoderm and the coelom is enclosed by endoderm. E. The coelom is enclosed by ectoderm and the pseudocoelom is enclosed by mesoderm.
where is HBV located?
What will be an ideal response?
UV radiation primarily mutagenizes cells because ________ are formed in the DNA, and that damage is often the cause for death of overexposed cells
a. pyrimidine dimers b. purine dimers c. hydroxyl radicals d. double-stranded breaks