This diagram shows magnetic stripes on either side of the midocean ridge. How many different ages of stripes are represented in this diagram?
A) Two
B) Three
C) Four
D) Six
E) Eleven
D) Six
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A star's color tells us
A. its surface temperature. B. its rotational speed. C. how much energy a star produces. D. both how much energy it produces and its surface temperature.
Which of the following must occur to insure that mRNA is functional?
A) Nothing, the newly synthesized mRNA is always already functional. B) The mRNA must be processed at the 3' end. C) The mRNA must be processed on the 5' end. D) The mRNA must be processed at both ends.
What is the June solstice?
A) the time of the year when Earth's geographic North Pole is leaning most directly toward the Sun B) the time of the year when Earth's geographic North Pole is leaning most directly away from the Sun C) The time of the year when Earth's geographic North and South Poles are leaning in similar ways toward the Sun
Where is the oldest known rock on Earth located?
A) Ural Mountains, Russia B) Slave Craton, Alberta, Canada C) Gobi Desert, Mongolia D) Dharwar Craton, India