Imagine you are studying the turgor pressure at two different ends of a sieve tube. One end of the sieve tube is located within a mature leaf, and the other end is located within the roots
When comparing the turgor pressure within the sieve tube at these two locations, what would you expect to find?
A. The turgor pressure will be the same at the
leaf and root ends.
B. The turgor pressure will be greater at the
root end.
C. The turgor pressure will be greater at the
leaf end.
D. Turgor pressure will not exist at either
location.
C
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The proper order of embryonic development is
A. morula-cleavage-blastula-gastrula. B. gastrula-cleavage-blastula-morula. C. cleavage-morula-blastula-gastrula. D. blastula-cleavage-morula-gastrula.
All of the following factors would cause potassium to shift into the cell, EXCEPT:
A) alkalosis. B) epinephrine release. C) increased vagal tone. D) insulin administration.
The human body contains approximately 200 major cell types. They look and function differently from one another because:
A. each has a slightly different genome. B. each expresses a different set of genes. C. each expresses the same set of genes, but in different orders at different times. D. each has a slightly different genome and each expresses a different set of genes.
In animal cells, what structure is homologous to plasmodesmata?
a. desmosome b. tight junction c. gap junction d. proteoglycan