Examine Figure 18.5. Which of the following species would you characterize as seemingly unresponsive to changes in soil conditions across the ecotone between serpentine and nonserpentine soils in southwestern Oregon?
A) black oak
B) hawkweed
C) ragwort
D) fireweed
Ans: B) hawkweed
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A scientist wants to study histones. Histones are:
A. proteins that double-stranded DNA molecules wrap around in eukaryotes. B. proteins that double-stranded DNA molecules wrap around in prokaryotes and eukaryotes. C. proteins that regulate checkpoints in the mitotic cell cycle. D. proteins that serve as the spindle fiber to pull sister chromatids apart during anaphase. E. proteins that required for the activity of Cdk enzymes.
Gregor Mendel ____
a. discovered the structure of DNA b. claimed that each individual carries a pair of "factors" for a given trait c. demonstrated that traits carried by parents are "blended" in their offspring d. cross-bred thirty different species of pea plants over a span of fifty years e. reasoned that each parent carries one gene for a specific trait
The use of R.I.C.E. in combination with exercise is called:
What will be an ideal response?
Eukaryotic cell mRNA transcripts can remain in the cell for hours because they are
A. stable. B. long. C. isolated. D. analogous.