Echinoderms Suck Water into the Water Vascular System Via a Sieved

question 16

Short Answer

Echinoderms suck water into the water vascular system via a sieved opening called the __________.

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Definitions:

Midpoint Formula

A method used in economics to calculate the elasticity of a variable, such as demand or supply, based on changes in price and quantity from a midpoint on a curve.

Elastic

Describes a situation in economics where the demand or supply for a good or service significantly changes in response to a change in price.

Perfectly Inelastic

A situation in market demand or supply where the quantity demanded or supplied does not change regardless of changes in price.

Equilibrium Price

The price at which the quantity of a good or service demanded equals the quantity supplied, leading to a state of balance in the market.