Atricky question with no single right in maintaining the functional shape of an enzyme, are the non-covalent interactions or covalent bonds stronger?

The probability of producing a normal child by two parents who are carriers for an autosomal recessive disorder is

In the presence of oxygen, glycolysis is followed a. the krebs cycle b. lactic acid fermentation c. alcoholic fermentation d. photosynthesis

Fossils of ancestors of the modern horses show a small 4-toed almost dog-like browsing animal named eohippus over time the horses got larger lost toes and changed to a grazing diet what is the best explanation of why this change occurred