What are soil particles that are decomposing organic matter called?
a. sand
b. humus
c. silt
d. clay
Answer: b. humus
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Survivorship curves plot ________ against x
A) dx B) lx C) log lx D) qx
An sRNA is isolated from a bacterial cell. What would you do to determine whether it is a cis-encoded or a trans-encoded sequence?
A. Find out if the sRNA acts as a transcriptional or as a translational inhibitor. B. Determine whether the sRNA binds to mRNA or to tRNA. C. Analyze the molecular position of hydrogen atoms in the sRNA nucleotides. D. Identify whether or not the sRNA sequence is complementary to the coding strand of mRNA gene target.
Suppose that Joe Scientist fuses a mouse cell and a human cell, and then treats the cell with specific antibodies covalently linked to fluorescent dyes (antibodies linked to mouse proteins are green; antibodies linked to human proteins are red). What will the cell look like immediately after labelling?
a. The red and green fluorescent labels will be uniformly distributed across the entire membrane of the cell. b. The cell will be half red and half green. c. The red and green labels will be distributed in the cell in intermingled patches. d. The red and green labels will flash in the cell intermittently
All the organisms of various species living within a given area constitute a(n)
What will be an ideal response?