In what way can animals with bilateral symmetry be divided?

Darrel conducted an experiment with the following procedure: fill two cups with ice water. place an uninflated balloon snuggly onto your left index finger. blow a little air into an identical balloon, and place it onto your right index finger. place both fingers into the cups of ice water. darrel noticed that his right finger felt warmer in the ice water than did his left finger. which of the following does the experiment show? a. air is a good radiator of heat. b. air is a good insulator of heat. c. air is a good conductor of heat. d. air is a good convector of heat.

Ais a landform that is formed at the mouth of a river from the deposition of sediment carried by the river as the water flows.

Knowing the importance of the essential elements, why would someone chose a diet that does not address all of them?