Seems like an open ended question, the habitat organ was the ocean, more specifically is probably the sea floor, since that it is where sponges (basal animals) live
Answer:
Saturation
Explanation:
A solution with as much dissolved solute as it can hold at a given temperature is said to be saturated. The solution is homogeneous since the solute and solvent are evenly distributed in the solution. The solution is saturated however, since no more solute can dissolve at a given temperature.
The corresponding evidence that supports the endosymbiotic theory would be options 1, 5, 6 and 2. I believe.
Both have a sporophyte generation and gametophyte generation. Also both have pollination, sperm cells travel through tube to reach ovule, and fertilization of egg cell with sperm cell produces zygote