Which statement best describes a keystone species?
O A. It is the largest animal in the community.
O B. It is the largest population in the community.
O c. It occupies the highest trophic level in the community.
O D. Its absence would affect many organisms in the community.
SUBMIT

D

Explanation: key-you need it to open a door

Keystone-u need it for ecosystem

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

geologic time scale (for gradpoint) =)