How many electrons does carbon lack in its outer shell?

Which two atoms are linked in each peptide bond?

Which statement accurately compares fast-flowing and slow-flowing areas of streams and rivers? Fast-flowing areas are usually warmer than slow-flowing ones.

What is the substance in saliva that makes food easier to swallow?

During warmer parts of the day, fish will be found in deeper waters of a lake. Which statement best explains this phenomena with respect to the solubility of a gas?

Which substances are contained in saliva and tears to break down pathogens? a enzymes b oils c acids d sweat

If a student wanted to separate the colored pigments from a green leaf, the student would likely consider the separation technique of: a. crystallization b. chromatography c. filtering d. distillation

Which of these is an enviromental effect of burning fossil fuels a. tempature increase b. soil erosion c. habbitat succesion d. Flooding

Which of the following is the best example of how factors within a person's environment can influence their personal health? A. eating too much sugar increasing a person's risk of diabetes B. regular exercise decreasing a person's cholesterol C.

What does a prokaryotic cell compare to (daily objects)

In some systems, energy will transform from one form to another. Which of the following is an example of electrical energy bei transformed to both kinetic energy and sound energy? A.) a television showing a movie B.) a tree falling in the woods C.