A research student is analyzing the nucleic acid of a virus. He finds that the nucleic acid contains thymine. From this it can be concluded that the nucleic acid
A) contains uracil.
B) contains ribose.
C) is actually a protein.
D) contains glucose.
E) is a strand of DNA.
E
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Consider the data in Fig. 46.11 illustrating the survivorship curve of the Lime Swallowtail butterfly. As indicated in your text, the survivorship from the egg to larval stage is 68%. Calculate the survivorship from the egg to pupal stage
What will be an ideal response?
The movement of sugars and other organic molecules through phloem is called __________. Fill in the blank(s) with the appropriate word(s)
The European corn borer is an insect whose larvae eat corn crops, thus reducing the yield of the crops. Scientists have genetically modified corn in the hopes of making it more resistant to infestation by the European corn borer. Design an experiment to
test whether the genetically modified variety is more resistant to infestation than an unmodified variety. State your hypothesis, and identify your experimental group and your control. What will be an ideal response?
Which types of bacteria are inhibited from growing on Endo agar?
A) Gram-positive bacteria B) Gram-negative bacteria C) Lactose fermenting bacteria D) Nonlactose fermenting bacteria