Scientists believe true commensalism may not exist because . the second organism is probably helped or harmed in unknown ways
parasites are most likely helping their hosts in subtle ways
most organisms prefer to compete and do not like to help each other
evolution and adaptation keep the organisms from killing each other

This is the substance(s) formed in a chemical reaction.

Will mark as brainliest how does a catapult increase the trajectory of an object? ps. answer as if u were a 5th grader

Four point charges each having charge q are located at the corners of a square having sides of length a. find symbolic expressions for the following. (a) the total electric potential at the center of the square due to the four charges (use any variable or symbol stated above along with the following as necessary: ke.) vtotal= (b) the work required to bring a fifth charge p from infinity to the center of the square (use any variable or symbol stated above along with the following as necessary: w=