Abiomass pyramid shows the mass of organic matter
a. at each trophic level
b. in the food web
c. of the producers
d. at the base of the ecological pyramid

If you have a difficult time knowing where your hand is without looking at it you may be having a problem with your what ?

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.

Crossing over is a method of (blank)?