The wheat weevil and the drummer wasp benefit from human activities. Can you think of another insect that benefits from humans? Explain the benefit.

the correct answer, according to e2020, is the second choice there is an occluded front in region a and a cold front in region b.

b brown mice / white sand dunes

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands

enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products