Roy throws a ball up in the air. Each time he throws the ball up in any direction, it falls back to the ground as shown in the
illustration. The ball comes back to the ground because of the

The response is the basis for vaccination. primary secondary tertiary none of the above

Identify any four organelles that should be present in the eukaryotic organism and describe the function of each organelle

Which of the following is caused by reproductive isolation within a species? a. a decrease in gene flow b. an increase in genetic flow c. a decrease in genetic drift d. an increase in gene flow