10 points
4. Puberty begins when the hypothalmus signals the pituatary to release
follicle-stimulating hormone (FSH) and luteinizing hormone (LH). During
this process, which systems are primarily interacting?
immune, reproductive, and nervous systems
circulatory, integumentary, and excretory systems
reproductive, endocrine, and nervous systems
excretory, reporcuctive, and endocrine systems

reproductive, endocrine, and nervous systems

the "power" of a lens is its resolution power, or its ability to distinguish between to closely located points. with the low power lens, it is likely you will see the rough form of the hay and maybe some movement of dots around the hay. however, when observed with the high power lens, the detailed features of the hay become visible and the microbes being grown are more clearly visible.

i hope this you