Rocks can be separated into extrusive and intrusive types. O Metamorphic
O Igneous
Sedimentary
Malleus

What are two reasons for why a species might disappear from the fossil record?

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

What causes darkening of the skin as melanin production increases