Barnacles are a type of arthropod in the subphylum crustacea, and are related to crabs and lobsters. barnacles are exclusively marine, tend to live in shallow and tidal waters, or attached to larger organisms. barnacles are sessile; that means they do not move about. the image shows barnacles attached to the tail of a humpback whale. in this relationship, the barnacles derive benefit. there is not benefit or harm to the whale. this relationship is an example of

a) commensalism.
b) competition.
c) mutualism.
d) predation.

Aregular polygon has angkes of size 150° each.how many side has the polygon

According to newtons universal law of gravitation, which would change the parh of the ball so it traces out widest curved path possible?

Unpolarized light falls on two polarizer sheets whose transmission axes are at right angles. a third polarizer is placed between the first two so that its axis makes a 52-degree angle with the axis of the first polarizer. a) what fraction of the incident light intensity is transmitted through the first polaroid? b) what fraction of the incident light intensity is transmitted through the second polaroid? c) what is the angle of polarization of the light that enters the third polaroid? d) what fraction of the incident light intensity is transmitted through the third polaroid. e) what happens if the middle polaroid is removed?