When classified according to the kind of chemical reactions catalyzed, digestive enzymes are referred to as enzymes.

The correct answer is d

The soviet union beat the us to the first successful launch, with the october 4, 1957, orbiting of sputnik 1, and later beat the us to have the first human in earth orbit, yuri gagarin, on april 12, 1961. the "race" peaked with the july 20, 1969, us landing of the first humans on the moon with apollo 11

Awell breed cat that has no defects or has never been damaged before.hope this ! mark me as brainiest!