Which term best describes the symbiotic relationship of well-fed P. bursaria to their zoochlorellae?
A) mutualistic
B) parasitic
C) predatory
D) pathogenic
A
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Once the cloning vector was formed, injecting it into the rose cells could be done by
A. enclosing it in a membrane-bound liposome that fuses with the cell membrane. B. attaching it to a virus that will infect the plant cell. C. attaching it to a small bead, and shooting it into the cell with a gene gun. D. All of these options are possible, but depend on the vector and the receiving cell's properties. E. electrifying the cell membrane to open a temporary hole among the phospholipids.
How do monotremes differ from other mammals? Check all that apply.
_____ Monotremes lay eggs. _____ Monotremes are found only in New Guinea and Australia. _____ Monotremes lack a placenta. _____ Monotremes have poorly developed nipples. _____ Monotremes are cold-blooded.
In eukaryotes, genetic material is packaged tightly in the nucleus. Which one of the following most accurately lists the components in order of increasing size (i.e., from smallest to largest)?
A. nucleotide, DNA duplex, chromatid, nucleosome, chromosome B. chromosome, nucleosome, chromatid, DNA duplex, nucleotide C. chromosome, chromatid, nucleosome, DNA duplex, nucleotide D. nucleotide, DNA duplex, nucleosome, chromatid, chromosome E. nucleotide, nucleosome, DNA duplex, chromatid, chromosome
With which type of microscopy would one observe three-dimensional structure?
A. fluorescence microscopy B. standard light microscopy C. confocal microscopy D. differential-interference light microscopy E. transmission electron microscopy