during which step of meiosis does crossing over occur?
a. prophase i
b. anaphase i
c. telophase i
d. metaphase i

In terms of alternation of generations, the internal parts of the pollen grains of seed-producing plants are most similar to a ) moss sporophyteb) moss gametophyte bearing both male and female gametangiac) fern sporophyted) fern gametophyte bearing only antheridia

Which of the following is a way that minerals are used? a. industry construction technology d. all of the above

Drag each tile to the correct box. arrange the layers and faults from oldest to youngest.