Which of these describes the b-cells within the immune system ? a) digestive system b) nonspecific receptor cells c) thymus maturing cells d) memory producing cells

Texas bluebonnet plants seen in this photo are an example of which ecological unit?

Average annual precipitation and are the two major features that define the biomes on earth.

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.