Which of the following best describes the mechanism(s) by which water can move inside a root?
a. apoplastic, transmembrane, and symplastic pathways
b. transmembrane and symplastic pathways
c. transmembrane pathway
d. apoplastic pathway
Ans: a. apoplastic, transmembrane, and symplastic pathways
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Direct-to-consumer genetic testing is available from several companies
a. True b. False Indicate whether the statement is true or false
DNA replication occurs during the __________ of the cell cycle
a. S phase b. G1 phase c. G2 phase d. interphase
Eosinophils are especially important in defending the human body from infection by
A) bacteria. B) viruses. C) molds. D) large parasites. E) any type of microorganism.
Which statement is accurate if the first true cell arose by the RNA-first hypothesis?
A. Proteins in the protocell would have evolved the ability to synthesize DNA. B. The first cell had RNA genes that could have specified protein synthesis. C. RNA genes replicated because of the presence of proteins. D. All of these statements support the RNA-first hypothesis. E. None of these statements support the RNA-first hypothesis.