which step in a scientific investigation would a scientist usually do before she performs an experiment?

How many skeletal muscles are in the human body?

A feedback mechanism (or loop) occurs when one change causes another, which in turn affects the original change. In terms of water, explain how the opening of stomate is an example of a feedback mechanism.

Which describes a group of organizations that is considered a species

Which of the following can increase as a result of stratospheric ozone depletion and can contribute to the melting of glaciers? A. radioactive decay B. ozone accumulation C. the intrusion of magma D. incoming solar radiation

What are the resources of the ocean

Best way to avoid infections and keep your immune system healthy

Certain fossils, such as Trilobites found after the Cambrian explosion, are found in the same geologic time period all over the world. What is the importance of fossils that are consistently found in the same geologic time period?

Phospholipids naturally form one layer. True False

True or false: the game between flashfone and pictech is an example of the prisoners' dilemma. a. True b. False

Do different emotions have very different patterns of activation in the brain?