They have two pairs of main nerve cords organized around a number of paired ganglia. while they don't have a "true brain"-- they have somewhat of a nervous system, composed of the two, or three pairs of nerve cords contained in the visceral mass.

8 0

4 years ago

3) Some birds follow moving swarms of army ants in the tropics. As the ants march along the forest floor hunting insects and sma

Serhud [2]

The answer would be commensalism

3 0

3 years ago

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once equilibrium is reached in which direction will molecules in a liquid state move across the membrane​

once equilibrium is reached in which direction will molecules in a liquid state move across the membrane