PLEASE HELP!! Life is organized starting with (select)
which are bonded together to form [Select] that make up
[Select]. These are part of [Select] which in humans form (Select) that are part of
Select] that work together as (Select) that act to maintain homeostasis for the (Select)

Options :
Organ system
Organelles
Cells
Molecules
Organisms
Atoms
Tissues
Organs

the oldest known insects are believed to live around 400 millions ago as suggested by the fossil records.   some plants having woody stems also evolved during this time.

after the evolution of insects the first four legged species or the tetrapods evolved in shallow freshwater habitats from the intermediate species approximately 397 million years ago. the tetrapods went on conquering the land giving rise to amphibians, reptiles, mammals and birds.

the major split in tetrapods first occurred 340 million years ago branching off from amphibians.

363 million years ago when the carboniferous period began the insects started roaming on land and taking flights, following which the four limbed tetrapods adapted in the terrestrial habitat.

answer; synapse; i believe this is correct,plz check first good luck;