The growth rate of a given species of microorganism is dependent on the composition of the medium in which it is grown.
Answer the following statement true (T) or false (F)
True
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The muscles of the myometrium:
A. are sloughed off during menstruation. B. create the contractions of labor and orgasm. C. form the external cover of the uterus. D. are very weak and are incapable of expanding
Leukocyte movement from blood to the site of tissue damage or infection involves ________, leukocyte movement toward the blood vessel wall; ________, the movement of leukocytes between endothelial cells of the blood vessel; and ________, the movement within the tissue to the site of injury.
A) margination : diapedesis : chemotaxis B) diapedesis : margination : chemotaxis C) chemotaxis : diapedesis : margination D) margination : chemotaxis : diapedesis E) chemotaxis : margination : diapedesis
Based on a variety of experiments, it is known that the rate of photosynthesis is highest when wavelengths of light between 400 and 500 nm are used, and when wavelengths around 700 nm are used. What does this indicate about the relative importance of chlorophyll a and b in photosynthesis?
A. Reflection of light by chlorophyll a and b is essential for the process of photosynthesis. B. Absorption of light by chlorophyll a and b is essential for the process of photosynthesis. C. Chlorophyll a and b are much less important than other pigments in the reflection, absorption and transmission of light relevant to photosynthesis. D. Transmission of light by chlorophyll a and b is essential for the process of photosynthesis.
The feature of "sticky ends" that makes them especially useful in DNA recombination is their ability to
A) bind to DNA and thereby activate transcription. B) bind to ribosomes and thereby activate translation. C) form hydrogen-bonded base pairs with complementary single-stranded stretches of DNA. D) allow plasmids to attach to the main bacterial chromosome.