Fungi can grow under all of the following conditions except:a
concentrated salt solutions.
b. an environment with a very low pH of 3.
c. a dry environment.
d. jelly or other sugar solutions.
e. a cold, refrigerated environment.
C
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Placental mammals appeared during the _____ period
What will be an ideal response?
A cell produces proteins when ribosomes (a form of RNA and protein) and transfer RNA (tRNA) work together. Specific amino acids are brought by tRNA into the ribosome, where they are rapidly connected by covalent bonds. This indicates that ribosomes are acting as
A. enzymes. B. substrates. C. a source of energy. D. active sites. E. reactants.
In the experiment studying bioluminescence and the predation of copepods by fish, a control group of jars with bioluminescent dinoflagellates experienced a higher predation rate of copepods by stickleback fish than in the jars with nonbioluminescent dinoflagellates. This provided significant evidence that
A. All of the answer choices are correct. B. natural selection has favored the survival of dinoflagellates that can emit light in flashes when disturbed. C. copepods that would eat dinoflagellates benefit from fleeing when the protists bioluminesce. D. dinoflagellates can avoid being eaten by increasing the flashing, and attracting predators to eat the copepods near them. E. natural selection has favored the survival of copepods that move rapidly away from flashing bioluminescent dinoflagellates.
Which of the following highly contagious viruses is a single-stranded ribonucleic acid (RNA) virus with a helical capsid and envelope and is transmitted by coming in contact with respiratory secretions?
a. Coxsackievirus A b. Rhinovirus c. Parvovirus d. Measles