Corper A
IM
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Epididyol
Semine vide
The production of mature sperm is a three-step process. Sperm begin as stem cell and eventually, as mature sperm,
travel to the urethra during ejaculation. What three structures, in order, are involved of the production of mature
sperm?
4)
testes, seminal vesicles, epididymous
3)
vas deferens, seminal vesicles, testes
-)
seminiferous tubules, testes, prostate
seminiferous tubules, testes, epididymis

Asap timed! 1. ice core samples from glaciers ice caps contain bubbles of ancient atmosphere that are in layers based on age. what questions are scientists most interested in? a. how the amount of water vapor needed to make the ice has changed b. how the amount of ozone has changed over time.c. how the amount of ice in each layer has changed over time d. how the amount of carbon dioxide has changed over time 2. what produces milankovich cycles ? a. sunspots ams solar flare on the suns surface b. changes in the earths orbit c. gravitational changes bases on the position of the sun and the moond. cycles of vegetation that result in desert and rainforest conditions

The gene that causes sickle-cell disease is present in a higher percentage of residents of sub-saharan africa than among those of african descent living in the united states. even though this gene causes sickle-cell disease, it also provides some protection from malaria, a serious disease that is widespread in sub-saharan africa but absent in the united states. discuss an evolutionary process that could account for the different percentages of the sickle-cell gene among residents of the two regions.

How are mitosis and meiosis similar?