Which of the following statements about igneous rocks is correct?
a. intrusive igneous rocks are formed when magma is cooled above the ground.
b. extrusive igneous rocks are formed when magma is cooled below the ground.
c. both intrusive and extrusive igneous rocks are formed below the ground.

Which best describes the digestive system of arthropods? a incomplete, two openings b complete, one opening c two-way, one opening d one-way, two openings

Identify the terms using the following picture. principle of dominance item 1 can be described as the . item 2 can be described as the . the "p" represents from one parent.

Which statement describes a way in which the digestive and excretory systems work together? a. the nephrons absorb nutrients from food going to the large intestine. b. the excretory system balances blood gases in the small intestine. c. the intestinal villi filter blood and send wastes to the bladder. d. the excretory system balances the salts and water obtained from digested food