The next two types occur when molecules are too to pars through the membrane.

Idk i think the answer choice is number 1

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

Bees shall never produce milk no matter what but this is a joke and the answer is a breast that produces milk.