Lodgepole pines, often found in the taiga, have an interesting adaptation for reproduction. These trees produce female cones that are sealed by a thick resin. In order to release their seeds, the resin gluing the cones closed must be melted.
Which of the following will open the cones of lodgepole pines to release their seeds?
A. a drought
B. a tornado
C. a wildfire
D. a hurricane

The organelle pictured is found in cells of and is theorized to have once been an independent organism.

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.

During the process of two rails or sides break apart and attract new nucleotide bases to form a new and complete strand.