The polar nuclei of the center cell
Answer is Middle Paleozoic era.
Paleozoic era was in 542 Ma - 245 Ma and it has 6 periods as Cambrian, Ordovician, Silurian, Devonian, Carboniferous and Permian.
360-280 Ma - forming of vascular plants with woody tissues, seeds and veins.
430 - 410 Ma - forming of jawed fishes and first amphibians.
420 Ma - forming of scorpions
360 Ma - forming of crustaceans.
the correct answer is the first one. density = mass / volume.
i hope this helped!
If the producer were to disappear then all the other organisms will either go extinct, survival of the fittest, or have to adapt to the change.
I guess metaphase? but i’m not sure since all of them are the phases of mitosis