A grizzly bear has a powerful jaw full of strong teeth that are used by the bear to capture and consume its prey. When a bear uses these tools it is an example of which of the following two body systems working together? a) Reproductive and muscular

b) Immune and digestive

c) Muscular and skeletal

d) Digestive and excretory

Which of the following statements is true of enzymes? a)they dont provide an active site for substrates to bind in a reaction b)they act on a specific type of substrate in a reaction c)they unusable after a reaction d)they change shape after a reaction

This is the diveristy of ecosystems natural communites and habits it is the variety of ways that species interact with each other and their environment

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