The fact that some isolated groups of South and Central American Indians are nearly 100% type O for the ABO blood system is best explained as being the result of:
a
embryologic evidence.
b
a bottle neck event.
c
founder's effect.
d
natural selection.

Ocean waves move up and down in circles, but transmit horizontally toward the shore.

What is the relation ship between structure and function in an 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.