The supercontinent Pangea ____.
A. existed over 500 million years ago
B. broke apart to form Gondwana
C. formed about 300 million years ago
D. was located only in the southern hemisphere
E. formed only North and South America
Answer: C
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Olfactory neurons first transmit their action potential to the central nervous system structure called the
A. amygdala. B. olfactory bulb. C. cerebellum. D. accessory olfactory bulb. E. cerebral cortex.
The current warming trend on the Earth is due solely to natural fluctuations
Indicate whether the statement is true or false
Which of the following membrane activities does NOT require the expenditure of energy by the cell?
a. active transport b. osmosis c. endocytosis d. exocytosis e. synthesis of more membrane
Which of the following is not true of transcription
What will be an ideal response?