What is the flexible extracellular matrix (not made of cells) that is found in all sponges? calcium carbonate
spongocoel
spicule
spongin

spongocoel

Explanation:

succession returns a disturbed

ecosystem to a more stable state. this is also classified into two (2) types:

primary succession and secondary succession. the primary succession arises when

a new land is transformed and a bare rock has been exposed providing an environment

that can be occupied for the first time. while, secondary succession occurs

when a previously occupied environment was disturbed that kills much of all its

community

explanation:

idk and i also need to know where are those bio brainy acts lol