The answer is A. Removing waste.
All cells reproduce by duplicating its DNA & dividing into two (MITOSIS), Cells MUTATE resulting in incorrect changes to DNA; mutation occurring over many generationsCells are all living things are made up of cells. Cells are the basic units of structure and function in living things and Living cells come only from other living cells.
Probably, molecules responsible for holding cells together (cell-cell adhesion) are specific for species, meaning that each species has its own molecules that don’t act on other species’ cells.
The term used for this property is species-specific cell recognition and most likely involved molecule is proteoglycan-like complex also called aggregation factor.
Even though, sponges are simple and at low phylogenetic position, their histocompatibility systems (compatibility of tissues) are at high level.
I'm pretty sure this is true. Don't quote me on that lol.
Answer:
A healthy ear is filled with air
Explanation:
Answer:- B
Explanation:- Samples of lunar rock and soil brought back by Apollo astronauts proved that the maria are composed of basalt formed from surface lava flows that later congealed. ... The maria basins were formed beginning about 3.9 billion years ago during a period of intense bombardment by asteroid-sized bodies.