Pressure flow involves
a. sugar transported in phloem.
b. sugar transported in xylem.
c. water transported in phloem.
d. water transported in xylem
A
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The snottites described in the case study at the beginning of this section are colonies of bacteria, extremophiles that have some unique requirements for life processes
For example, they use sulfur from the hydrogen sulfide in the environment to capture energy. Although most life forms you are familiar with, including humans, don't use sulfur for this purpose, we do use another element to do the same thing. Which element do humans use for this energy conversion? Carefully examine the periodic table. A. carbon B. nitrogen C. hydrogen D. oxygen
Active transport is different from simple diffusion in that active transport
A. requires energy. B. All of the answer choices are correct. C. moves molecules against a concentration gradient. D. requires transport proteins embedded within the cell membrane. E. moves molecules from an area of lower concentration to an area of higher concentration.
Which plants keep their stomata open only at night?
A. All plants leave their stomata open only at night. B. C4 C. CAM D. All plants leave their stomata open only in the daytime. E. C3
Functional snRNPs are assembled in the
a. cytoplasm. b. nucleolus. c. nucleoplasm. d. PML body.