Edward Jenner discovered vaccinations. He found that some of the dairymaids who worked with cows had suffered lesions
on their hands, and that these dairymaids were immune to the more severe smallpox. Which best explains why the
dairymaids were immune to smallpox?
They did not interact with many people so they were not exposed to the pathogen.
They frequently washed their hands so they were able to wash away the pathogen.
They were exposed to cowpox, and the substance their body produced to fight cowpox also attacked smallpox.
They breathed the air around the cows that carried an antipathogen in it that destroyed the pathogen.

homeostasis is the tendency towards a relatively stable equilibrium between interdependent elements, especially as maintained by physiological processes. and this is how it applies to the integumentary system. back to top. skin functions in homeostasis include protection, regulation of body temperature, sensory reception, water balance, synthesis of vitamins and hormones, and absorption of materials. when body temperature falls, the sweat glands constrict and sweat production decreases.

some inherited genetic mutations can be good for the offspring, so the answer is different genetic mutations cause many forms of cancer.

answer; hydrologic cycle;