Among the given name of the equinoxes, the fall equinox and the spring equinox are the valid names for the equinoxes.
The fall equinox, or the autumn equinox is the September equinox, while the spring equinox, which is also known as the vernal equinox is the March equinox.
There are no such equinoxes as partial or total equinox.
Hence, the correct answer is option A and D.
Answer choice: [C]:
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V = d / t = 1800 mi / 40 min = 180 mi / 40 min = 45 mi / min .
Which very well could be "Answer choice: [C]: 45 m/min" ; except, this answer choice may have been written incorrectly—and should read:
"45 m/min."
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Now, notice that all the answer choices given are in "meters" per (unit time—seconds or mins.
So, we need to convert:
45 mi. to "meters", or "m".
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Note the following conversions:
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1 mi. = 1750 yd
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3 ft. = 1 yd.
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1 m = 3.2 ft.
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So, 1 mi. = ? m ;
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1 mi * ( 1760 yd/ mi) * (3 ft / 1 yd) * ( 1m / 3.2 ft) = _?_ m ?
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On the "left hand side" , the units of "mi", "yd", and "ft" ; cancel to "1" ;
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and we are left with:
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[(1760 * 3)] / [(3)*(3.2)] m = (5280 / 9.6) m = 550 m .
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So, we have: 550 m / min ; which match NONE of the answer choices.
However, it is possible that choices A or B, which are given in "m/sec" (meters per second); are among the correct choices.
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So, we convert: 550 m / min to: "m / sec " ;
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( 550 m/ min)*(1 min/ 60 sec) = (550/60) m/sec = (55/6) m/ sec
= 9 1/6 m / sec .
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which is: None of the above.
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Unless the answer choices were written incorrectly.
Answer:
These changes can be caused by environmental factors such as ultraviolet radiation from the sun, or can occur if an error is made as DNA copies itself during cell division. Acquired mutations in somatic cells (cells other than sperm and egg cells) cannot be passed to the next generation.
