The sequence of development of sperm is:
A) primary spermatocyte, secondary spermatocyte, tertiary spermatocyte, spermatid, sperm.
B) spermatogonia, spermatocyte, spermatid, sperm.
C) immature sperm, mature sperm, secondary sperm, spermatocyte.
D) primary spermatocyte, spermatogonia, sperm.
Answer: B
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Which of the following is TRUE when comparing solutions with a pH of 6 and a pH of 8?
A. The solution with a pH of 8 has a 100 times higher concentration of hydrogen ions than a solution with a pH of 6. B. The solution with a pH of 8 has a 2 times higher concentration of hydrogen ions than a solution with a pH of 6. C. The solution with a pH of 8 has a 100 times lower concentration of hydrogen ions than a solution with a pH of 6. D. The solution with a pH of 8 has a 2 times lower concentration of hydrogen ions than a solution with a pH of 6. E. The hydrogen ion concentration does not appreciably differ between a solution with a pH of 8 versus that with a pH of 6.
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Indicate whether the statement is true or false
Select the statement(s) associated with heavy exercise in high heat, with lots of sweating and no eating or drinking. (Select all that apply.)
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Changes to an organism's DNA can cause unexpected traits to be expressed in its offspring. DNA in an individual's gametes will most likely be altered before being passed to offspring if exposed to
A. x-rays B. loud sounds C. magnetic fields D. extreme temperatures