Distinctly different groups within a species are known as
A. varieties.
B. breeds.
C. subspecies.
D. All of these answers are true.
D. All of these answers are true.
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You have chosen RNA as the most likely molecule to be first enclosed by a membrane. You understand that it has the ability to store information and can self-replicate, but what else is necessary for simple metabolic processes to occur in a timely manner?
A. A biological catalyst. B. Energy from ADP. C. A pump, to drive a concentration gradient. D. A more stable nucleic acid. E. The ability to carry out structural roles.
In the early Earth, the development of ________ created oxygen gas in the atmosphere
A) ozone B) nitrogen fixation C) cellular respiration D) photosynthesis E) eukaryotes
These facial bones increase the ability of the nasal passageways to warm and humidify incoming air.
What will be an ideal response?
The mordant for the endospore stain is the _________ process.
Fill in the blank(s) with the appropriate word(s).