Answer:
there are tree hypothesis
Explanation:
There are several mechanisms by which multicellularity could have evolved:
1. A group of cells were added in a slug-shaped mass called grex, which was moved as a multicellular unit, as the Myxomycota do.
2. The primitive cell suffered an incomplete division of the cell nucleus generating a cell with multiple nuclei or syncytium. Next, membranes formed around each nucleus and the space was occupied by organelles. This resulted in a group of cells connected in an organism, an observable mechanism in Drosophila.
3. Daughter cells did not separate after cell division, resulting in a conglomeration of identical cells in an organism, which later developed specialized functions. This is observed in embryos of plants, animals and colonial cyanoflagellates.
Should read more about the topic here, google it:
<em>Multicellular development in a choanoflagellate; Stephen R. Fairclough, Mark J. Dayel and Nicole King
</em>
<em>In a Single-Cell Predator, Clues to the Animal Kingdom’s Birth</em>
I have some ideas , “does music effect on animal behaviour” and an experiment to that could be noticing the behaviour of a dog or cat without music then with music , i have more ideas if you don’t really like this one
Answer:
The Age of mammals, because the largest land animals have been mammals. So yes.
Explanation:
Because humans are mammals.
Endoderm forms the epithelium—a type of tissue.
Atoms with a(n) covalent bond share electrons.