20. Sketch and label a centrosome with two centrioles.

1. How is air in a tire like blood?

The role of LH in males is to A. stimulate the testes to produce testosterone. B. stimulate spermatogenesis. C. develop and maintain secondary sex characteristics. D. influence sexual behaviors and sex drive.

\begin{tabular}{l} 19. What types of cells in our bodies \\ undergo melosis? Where are they \\ located? \\ \hline\end{tabular}

Kelsei says she can no longer walk to class without getting winded. While talking with her doctor, she admits she vapes heavily. Her behavioral choices influence what type of aging? Consequential aging Secondary aging Primary aging Inevitable aging

What triggers the release of parathyroid hormone (PTH)? B. decreasing sodium ion concentration of the blood C. increasing potassium ion concentration of the blood D. increasing calcium ion concentration of the blood