Which of these groups is (are) flagellated protist(s)?
a. parabasalids
b. euglenoids
c. diplomonads
d. kinetoplastids
e. all of these
Answer: e
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Plants are more readily manipulated by genetic engineering than are animals because _____
A) plant genes do not contain introns B) more vectors are available for transferring recombinant DNA into plant cells C) a somatic plant cell can often give rise to a complete plant D) genes can be inserted into plant cells by microinjection E) plant cells have larger nuclei
Compare and contrast the roles of cell division and morphogenesis in the development of an animal. What will be an ideal response?
During gas exchange, oxygen and carbon dioxide always move:
A) into the blood. B) out of the blood. C) into the alveoli. D) down their concentration gradients.
When oxygen is present in the environment, methylene blue is ______.
A) blue B) colorless