Identify the function of the labeled structures.
a:
b:
c:
d:

options-
-connects arteries and veins
-brings blood back to the heart
-carries blood away from the heart
-pushes blood into the arteries

Which of the following is a macronutrient? carbohydrates lipids amino acids all of the above

Elephants in the savanna regions of africa dig holes in dried up river beds to reach water lying just below the surface. these holes provide drinking water for other animals as well. so, without the elephants, many animals might otherwise die from lack of water during the dry season. the location in which the elephants live is an example of a/n and the role they play in creating water holes is an example of a a) ecosystem; habitat b) community; niche c) habitat; niche d) niche; habitat

Which statement correctly describes a way that mutations increase the likelihood that a species will survive in a changing environment