By 1999, after the Clean Water Act had been passed in 1970, the percentage of U. S. surface waters safe for fishing and swimming had increased from 36 percent to

In the scientific method, the conclusion is based on the original beliefs of the scientist the results of the experiment but not the hypothesis the results of the experiment and the hypothesis only the hypothesis and not the experiment

The ancestors of mammals diverged from ancient

Which of the following marine ecosystems consist of and of frantic which of the following marine ecosystems consist of an aphotic zone? A. The wetland B. The intertidal zone C. The costal ocean D. The open ocean

What Type of skeleton (ENdoskeleton, EXoskeleton, or None) do Cnidarians have

this diagram shows molecules moving across a selectively permeable membrane. the smaller circles represents salt molecules, and the dashed line represents the membrane. which statement best describes the movement of the salt molecules

What are two ways excess nitrogen is added to the nitrogen cycle

Examples of autoimmune disease are _ a Flu, rheumatoid arthritis and Type I diabetes b Type I diabetes, rheumatoid arthritis and influenza c Lupus, rheumatoid arthritis and Type I diabetes d Type I diabetes, malaria and lupus

In order to grow, all organisms must

The DNA in a cell's nucleus encodes proteins that are eventually targeted to every membrane and compartment in the cell, as well as proteins that are targeted for secretion from the cell.

What similarity do animals and plants share?