In the Northern Hemisphere, in what direction does the apparent position of the sun on the horizon at sunrise move as summer turns to winter?
A) north to south
B) south to north
C) east to west
D) west to east
A
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The Emerson enhancement effect
A) was proposed by Robert Emerson in the 1980s. B) states that there are three or four separate photoreactions. C) is a synergistic phenomenon. D) is the result of two distinct photosystems. E) both choices C and D
Which best describes genotype and phenotype, respectively?
a. The type of genetic makeup and the type of phenomena that the organism experiences b. The location of the alleles and the overall condition of the organism c. The structure of the alleles and the outward appearance of the organism d. The heritable characteristics of the alleles and the offspring of the alleles
Unlike most other animals, sponges lack which of the following?
a. a digestive tract only b. a symmetrical body plan only c. tissues only d. a digestive tract and a symmetrical body plan only e. a digestive tract, a symmetrical body plan, and tissues
As you and a friend are entering a chemistry laboratory at your university, you see a sign that states: DANGER-RADIOACTIVE ISOTOPES IN USE. Your friend is an accounting major and has not had any science courses yet. She asks you what a radioactive isotope is and you respond correctly with:
A. Radioactive isotopes are atoms that are unstable and as a result emit energy in a process called radioactive decay. B. Radioactive isotopes are atoms that are stable and as a result only emit energy if they are exposed to higher temperatures. C. Radioactive isotopes are atoms that are stable and as a result emit energy in a process called radioactive decay. D. Radioactive isotopes are atoms that are unstable but unless actively disturbed by some chemical process will remain intact and pose no problems.