A naked virus does not have a(n) ________.
Fill in the blank(s) with the appropriate word(s).
envelope
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One example of an innovation from an unexpected source comes from studies of tumor-like plant growths. What information did the study of plant tumors provide that was critical for plant genetic engineering?
A) understanding the role of plant hormones in growth promotion B) knowledge of plant tumor suppressor and proto-oncogenes C) learning that metastasis is critical for tumor progression D) learning the biosynthetic pathway to ?-carotene E) discovery of a plasmid that could be modified to introduce genes into plants
Which of the following events occurs during the first trimester of pregnancy?
A. The heart begins to form. B. The lungs fully mature. C. The fetus grows to 1 foot in length. D. The fetus has a very rapid phase of growth. E. All of these events occur during the first trimester.
Products and by-products of photosynthesis do NOT include
a. O2. b. C6H12O6. c. CO2. d. H2O.
What sugar is used in the presumptive test?
A) Lactose B) Glucose C) Sucrose D) Dextrose