Fats, oils, phospholipids, steroids and waxes are all examples of which are macromolecules made up almost entirely of hydrogen and carbon.

The many volcanoes located along the edge of the pacific ocean make up the ring of fire. how does subduction play a role in the volcanic activity in the ring of fire?

Which of the following is not a defining characteristic of plants?

The galapagos island contain 13 species of finches four of the species are seen here it is believed that all of the species had one common ancestor and overtime