Adenine always binds to thymine and cytosine always binds to guanine
a. true
b. false
Answer: a. true
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An unpressurized autoclave would not be able to sterilize a growth medium with contaminating bacteria but could still pasteurize it
Indicate whether the statement is true or false.
Unlike single-celled organisms that have direct contact with their external environment, most cells in a multicellular
organisms do not have direct contract with their external environment. How do these cells acquire nutrients and eliminate wastes?
a. by active and passive transport between the basal lamina and the interstitial fluid b. by active and passive transport between the basal lamina and the plasma c. by active and passive transport between the intracellular fluid and the interstitial fluid d. by active and passive transport between the intracellular fluid and the plasma e. through gap junctions between the intracellular fluid and the plasma
Which of the following enables corals to grow in shallow waters?
a. mutualistic relationships with protists b. nutritionally rich water and silt c. high levels of ocean acidity d. calcium-rich plankton
Three cells with generation times of 60 minutes are inoculated into a culture medium. How many cells are there after 5 hours?
A) 900 B) 180 C) 96 D) 32 E) 15