A Coulter counter is used to obtain pure cultures.
Answer the following statement true (T) or false (F)
False
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An example of megaplankton would be:
a. larval fishes. b. Sargassum seaweed. c. invertebrate larvae. d. green flagellates. e. copepods.
Which of the following statements is NOT true about
asteroids? a. They have had little influence on the history of life. b. They do not emit light and are difficult to see. c. Their impacts have produced craters visible in satellite images. d. One asteroid impacted our planet just prior to the mass extinctions at the K-T boundary. e. An asteroid impact releases an enormous quantity of energy.
How does the scanning electron microscope differ from the transmission electron microscope?
a. The SEM can view a live specimen. b. The SEM can view the internal structure of a cell. c. The SEM utilizes a beam of light that passes through the specimen. d. The SEM gives a three dimensional image of the object being studied. e. The SEM relies on the detection of electrons from the beam after contact with the specimens.
In humans, male-pattern baldness is controlled by a gene that occurs in two allelic forms. Allele Hn determines nonbaldness, and allele Hb determines pattern baldness. In males, because of the presence of testosterone, allele Hb is dominant over Hn. If a man and woman both with genotype HnHb have a son, what is the chance that he will eventually be bald?
A) 0% B) 25% C) 33% D) 50% E) 75%