Arteries near the heart expand as blood rushes in after each contraction. Which component in the arteries allows this expansion? (2 points) Connective tissue in the tunica media
Smooth muscle in the tunica media
Endothelium in the tunica intima
Elastin protein in the tunica intima

Which set of characteristics best describes sedimentary rock? a) largest type of rock, made of organic matter, hardest type of rock b) often contains layers, forms near sources of water, contains fossils c) least abundant type of rock, made of other rocks, made mostly of minerals d) most abundant type in earth's crust, made of magma/lava, contains no fossils

Under the soviet system, the government a. controlled all forms of communication. b. allowed newspapers to print whatever they wanted. c. controlled editorials but not the reporting of news. d. encouraged access to a wide variety of news sources. select the best answer from the choices provided a b c d

Explain why biological control methods are generally environmentally superior to chemical pest control methods.