Muscular contractions control the position of the scrotum, which allows the penis to become erect
helps regulate the temperature of the testicles
causes semen to be ejaculated during intercourse
causes peristaltic action to move semen through the vas
deferens

Where is energy trapped inside the organelle chlorophyll

25) a student takes four samples of a white crystalline solid and places each in a well plate. on top of each sample, she carefully places 20 drops of clear mystery liquids a, b, c and d. her results for each well are: liquid a: the solid dissolves quickly. liquid b: the solid appears unchanged. liquid c: a brownish colored liquid is produced. liquid d: fizzing occurs and the well becomes warmer. in which well does a physical change occur?

What is the relation ship between structure and function in an organism