The smallest unit of an element that retains all the characteristics of that element is called a(n)
a. atom.
b. compound.
c. molecule.
d. proton.

i don't know. if i were you, i would search it up online : d

lunar landing mission. apollo 11 was the first manned mission to land on the moon. the first steps by humans on another planetary body were taken by neil armstrong and buzz aldrin on july 20, 1969. the astronauts also returned to earth the first samples from another planetary body.

explanation:

the offspring would all be white. if the parents are both white flowers then they have the genotype rr, which when crossed results in an all white punnet square.