True or false? the production of sperm begins at puberty when spermatogonia undergo meiosis i to form primary spermatocytes, which then undergo meiosis ii to form secondary spermatocytes. these secondary spermatocytes go on to form spermatids, which mature into sperm cells.

During a hot day, warm and moist air rises and cools in the atmosphere. which even would occur next on such a day? a. condensed droplets would gather to become water vapor. b. water vapor would condense into tiny droplets. c. water droplets would evaporate to form rain and snow.

When analyzing tree rings, what do scientists assume a thin ring indicates?

Dna replication or repair occurs in a cell in all of thw following situations except when