Which of the following visual association with its related cause is NOT correct?
A. color blindness - lack of red or green cones
B. nearsighted - unable to see near objects in detail
C. cataracts - lens becomes opaque with aging and sun exposure
D. eyestrain - muscle fatigue from constant contraction of the ciliary muscle
Answer: B
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Some bacteria can insert genes into the plant genome, altering the growth and metabolism of the plant in ways that enhance the bacteria's growth
A. true B. false
The number of bird species on islands near Papua New Guinea __________ as one gets farther from Papua New Guinea.
A. increases B. decreases C. is unknown D. shows an inconsistent pattern E. None of the choices are correct.
How might absorption of organic compounds into clays assist in their aggregation and organization
into membrane-bound protocells?
a. Clays contain many minerals in extremely thin layers and readily repel ions, forcing multiple chemical interactions. b. Clays are highly structured, contain water, and store potential energy that could drive the chemical reactions forward. c. Clays lack water, forcing the concentration of the organic molecules and thus driving multiple interactions. d. Clays are extremely resistant to temperature changes and thus would insulate the organic compounds from temperature changes in the atmosphere. e. None of the above statements accurately explain clays’ possible roles in the formation of protocells.
Which of the following trophic levels would contain the lowest quantity of energy (kcal per m2)?
a. secondary consumers b. tertiary consumers c. herbivores d. producers e. primary consumers