The last one is correct lol
Saliva is a part of the digestive system. saliva contains enzymes that help start the breakdown of food in the digestive process
Answer:
Fossils provide evidence about life on Earth that currently extinct. Through fossils, we've discovered several species of animals and plants that previously existed. We also learn how life on Earth changed throughout the years. Fossils found in younger rocks look like animals and plants that are living today. Fossils in older rocks look less like the current living animals and plants. Some fossils found look either more or less like current species we know today.
Explanation:
The fibrous skeleton of the heart
functions in all of the ways listed in the option, except causing direct spread
of electrical impulses from the atria to the ventricles. The fibrous skeleton
in fact supports proper coordination of atrial and ventricular contractions by
blocking direct spread of electrical impulses from atria to ventricles.
