Biology, 02.08.2019 12:00 smariedegray
Which statement best describes the difference between xylem and phloem? a..xylem transports water and nutrients in the plant, and phloem transports water and sugar. b..xylem cells make up vascular tissue, and phloem cells make up ground and dermal tissue. c..xylem tissue is found at the growing parts of plants, and phloem is found on the outer part of plants. d..xylem cells are thin-walled and tubular, and phloem cells are thick walled and strengthened by lign
Answers: 2
Biology, 21.06.2019 18:30
The gene that causes sickle-cell disease is present in a higher percentage of residents of sub-saharan africa than among those of african descent living in the united states. even though this gene causes sickle-cell disease, it also provides some protection from malaria, a serious disease that is widespread in sub-saharan africa but absent in the united states. discuss an evolutionary process that could account for the different percentages of the sickle-cell gene among residents of the two regions.
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Biology, 22.06.2019 03:50
According to your text, should be in the native language of the parents or guardians whenever possible. a. an email b. consent forms c. oral approval d. storybooks loaned out
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Biology, 22.06.2019 05:30
Can bacteria reproduce in a way such that when you start out with two bacteria, you get five bacteria? why or why not? * a. yes, because bacteria reproduce sexually, and can produce any number of offspring, just as humans do. b. no, because bacteria grow at an exponential rate. c. no, because when bacteria reproduce, they split into two parts, and two bacteria splitting would result in four bacteria.
Answers: 1
Biology, 22.06.2019 11:40
Which of the following happened during the precambrian era? the first prokaryotic cells the first eukaryotic cells development of photosynthesis all of the above
Answers: 1
Which statement best describes the difference between xylem and phloem? a..xylem transports water a...
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