Who arranged organisms into a scale of nature and first stated that organisms changed toward the more complex and
perfect?
a. Aristotle
b. Lamarck
c. Dobzhansky
d. Charles Darwin
e. Erasmus Darwin
a
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Nitrogenase is a critical enzyme in the nitrogen cycle because it catalyzes the
A) assimilation of ammonia. B) dissimilative reduction of nitrate to nitrogen gas. C) fixation of nitrogen gas into ammonia. D) oxidation of nitrogen gas into nitrate.
Uptake of food particles by trapping them within an invagination of the plasma membrane is called ________.
Fill in the blank(s) with the appropriate word(s).
Which is a hominin?
a. chimpanzees only b. australopiths only c. baboons only d. humans and australopiths e. chimpanzee, australopiths, and baboons
________ is the mechanism by which some organisms, such as Komodo dragons, can develop eggs into zygotes without sperm
Fill in the blank with correct word.