Give an example of a scientific investigation that would require both observations and experiments

Tetracycline has long been added to livestock and poultry feed in the united states in order to produce rapid growth as well as protect herds and flocks from infectious diseases. why is this problematic?

What does the heart do?

In what ways is the atmosphere of the earth different from the gaseous consistency of the early universe

The first clues of a biological incident include which of the following? (Select all that apply.) Select one or more: a. Unscheduled and unusual spray being disseminated b. An outbreak of psoriasis c. Abandoned spray devices d.

Organisms require energy to maintain a proper internal order. If the orderly internal environment of the cell is not maintained, the cell will die. Which term BEST describes this concept? A) diffusion B) entropy C) mutation D) respiration

How does the immune system know if a foreign particle has infected the body?

If you eat food while hanging upside down do you think it will go through alimentary canal? Give reason

Multiple copies of a duplicated gene can turn into a group of genes referred to as a

Unlike amphibians, reptiles- A. have lungs to oxygenate blood. B. have a closed circulation system in which blood circulates entirely within blood vessels. C.

Markus has put off doing his homework so that he can play video games. his mother starts nagging him to do his homework. markus turns off the video game and does his homework to stop his mother from nagging. in this example, the nagging is a: