Middle-income countries such as India and China may have low , but they have a high . a. population size; population growth rate a. overall environmental impact; population growth rate b. population size; resource use per person c. overall environmental impact; resource use per person d. resource use per person; overall environmental impact

segmentation=endoskeleton=backbone=coelom=tissues

i think the answer would be d

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