The circulatory system works with the digestive system to carry the nutrients from the food to the blood and the rest of the body? how dose this maintain homeostasis?

Why are fossils not found in igneous rocks? igneous rocks are made from cooling of lava or magma. igneous rocks are found too deep underground. igneous rocks are too dark in color to contain fossils. igneous rocks are too dense to contain fossils.

What are two ways that harvesting algae from the ocean may benefit human society? how might the harvest of algae negatively impact the ocean communities where that algae grows? how could this be prevented?

Read each description below and determine to which stage of sleep each pertains. then click and drag each box into the appropriate category below.