What is meant by "semi-conservative replication"?
What will be an ideal response?
When molecules of DNA are replicated, the parent double helix "unzips," and new complementary nucleotides are brought in to match up along each parental strand. Thus, the two new double helices of DNA each have a parental strand and a new strand, making the replication semi-conservative.
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Protection from injury, dehydration, and microbes is provided by the
a. immune system. b. skeletal system. c. integumentary system. d. endocrine system. e. lymphatic system.
Which of the following explains how phloem sap moves within a plant?
A) cohesion-tension mechanism B) gravity pulls the phloem sap down C) pressure-flow mechanism D) transpiration
A person reports to a clinic complaining of fever and abdominal pain. The abdomen is swollen, and blood tests indicate liver damage. A stool sample is examined under a microscope and found to contain eggs with a spine projecting from its surface. The indications are consistent with infection with
A) Ancylostoma duodenale. B) Enterobius vermicularis. C) Echinococcus granulosus. D) Schistosoma mansoni. E) Taenia solium.
Osmosis is the transfer of ________ through a semipermeable membrane.
Fill in the blank(s) with correct word