<span>Sponges have cellular-level organization, meaning that that their cells are specialized so that different cells perform different functions, but similar cells are not organized into tissues and bodies are a sort of loose aggregation of different kinds of cells. This is the simplest kind of cellular organization found among parazoans.
<em>I hope this helps!~</em><em /></span>
15)C
16)D because the function of mitochondria is providing energy
17)B cell wall
18)C cell membrane
19)C plantae
20)B cytoplasm
Homozygous is the same heterozygous is different. Such as TT and tt are homo and Tt is heterozygous.
The sporophyte produces
cones, an evergreen tree