Gravity is a force of attraction that acts
a. on nearby masses
b. on select masses
c. on no masses
d. on every mass

In general, characteristics that an organism survive and reproduce become more common over time. what mechanism of evolution causes this?

Which of the following was a characteristic of a dromaeosaur? modified front claw grasping with their forelimbs both a and b none of the above

What molecule contains an organisms genetic material, passed down from parents to their offspring