Diatoms, like most phytoplankton, are much more abundant in the photic zone than in the aphotic zone. Which two factors found in the photic zone are the most essential for phytoplankton

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:

not: both offer magnification to the atomic level.