What important instrument was used in early navigation to find the latitude of a ship?
a. Sextants
b. Bathygraphic charts
c. Chronometers
d. GPS
a
You might also like to view...
The reaction (H2 + F2 ? 2HF) is an example of a redox reaction. In reality, two half reactions are occurring. The half reaction (H2 ? 2H+ + 2e- ) is a(n):
A. potential energy reaction B. redox reaction C. oxidation reaction D. reduction reaction
The sum of all gene copies at all gene loci in all individuals in a population defines a ____
a. ploidy level b. genome c. polymorphism d. gene pool e. genetic database
What would happen if the trachea did not have cartilaginous rings?
A) Incoming air would not undergo filtration. B) Incoming air would not be humidified. C) Sense of smell would be lost, and food would taste funny. D) The trachea would collapse.
You are trying to produce cDNA starting from mRNA in skeletal muscle cells. You add the following components to a tube and let the reaction proceed: skeletal muscle mRNA, free nucleotides, and DNA polymerase. After inspecting the products of the
reaction, you do not find any cDNA molecules at all. What is the most likely explanation for this result? A) You used mRNA instead of genomic DNA as the source material. B) You used DNA polymerase instead of reverse transcriptase. C) cDNA can only be made from skin cell mRNA molecules. D) You forgot to add a radiolabeled nucleic acid probe to the tube.