This drawing shows the internal anatomy of a sponge. what does the arrow in the middle represent? a) the direction of the sponges travel through the water b) the flow of water through the body of a sponge c) the path sperm take to fertilize the egg of a sponge d) the path food takes through the digestive system of a sponge

The correct answer would be B) the flow of water through the body of a sponge.

Sponges are multi-cellular organisms which are devoid of organ systems like digestive system, nervous system, circulatory system et cetera.

They have a unique feeding system in which they keep constant water flow through their bodies. They obtain food and oxygen and remove waste through this water movement.

The movement of water throughout the sponge is unidirectional in nature. It enters the sponge body through ostia and exit from the osculum.

As the water is pumped out, the cells present in the walls filter out the food present in the water.

the correct answer is 4) heat and pressure

metamorphic rocks arise from transformation of existing rocks types, in a process called metamorphism. during metamorphism the original rock(prolith) change into metamorphic rock by heating (150-200c) and pressure of more than 1000 bar. the original rock can be sedimentary, igneous, or existing metamorphic rock.

japan is the correct anwser because i already took the test and i passed it