The induced-fit model for enzyme specificity was proposed by

hope this

explanation:

covalent bonds

consist of pairs of electrons shared by two atoms, and bind the atoms to fixed orientation and requre high energies to break them

ionic bonds

when two atoms differ considerably in their electronegativity, then one of the atoms will lose its electron to the other atom. this results in a positively charged ion(cation) and a negatively charged ion (anion)

i think it is d. e because the next one is igneous.

2b2t

explanation:

2b2t

that's what i got you can count the number of atoms