Your microscope has an ocular lens with magnification 10x and you are using a 100x objective lens to observe your specimen. What is the total magnification of your final image?
A. 10,000
B. 1,000
C. 100
D. 10
Ans: B. 1,000
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Consider the following experiment. First, large populations of two mutant strains of Escherichia coli are mixed, each requiring a different, single amino acid. After plating them onto a minimal medium, 45 colonies grew
Which of the following may explain this result? A) The colonies may be due to back mutation (reversion). B) The colonies may be due to recombination. C) Either A or B is possible. D) Neither A nor B is possible.
Carbon dioxide is an element
Indicate whether the statement is true or false.
Most atmospheric carbon dissolved in the ocean is in the form of ____
a. carbon dioxide b. carbon monoxide c. hydrocarbons d. bicarbonate and carbonate e. carbon gas
Several chemical pollutants from a paper mill are released into the nearby environment. Compound A is rich in calcium and magnesium. Compound B binds tightly to all free polypeptides and proteins in the soil
Compound C is structurally similar to abscisic acid. Based on this scenario, which compound will most likely harm the surrounding vegetation, and what effect(s) will it have on the plants? A) Compound A, because these minerals will act as toxins to the plant as they are absorbed through the roots. B) Compound C, because abscisic acid inhibits the active transport of potassium ions and thus closes the stomata, which will interfere with CO2 uptake and H2O transport. C) Compound B, because it ties up free polypeptides and proteins in the soil, preventing their uptake by plants, which is critical for plant growth.