Which two stages of meioses are most responsible for genetic variation A. metaphase 1 and metaphase 2
B. anaphase 1 and prophase 1
C. metaphase 1 and prophase 1
D. anaphase 1 and prophase 1

Look at the figure above. which atmospheric layer has around 80 percent of the mass of the earth's atmosphere? (hint: it's where the clouds seen on earth are formed.) a. exosphere b. troposphere c. stratosphere d. thermosphere

Sperm pass through the and connect to a short ejaculatory duct. vas deferens prostrates seminiferous tubules none of the above

In each transformation of energy , some energy what?