a balloon expands and shrinks. which type of cell does the balloon best model? a. guard cell, b. bone cell, c. nerve cell, d. epithelial cell

Sorry its not enough info

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

H×ph=memesand logan paul