Gases expelled from the rear of a rocket push the rocket in the direction in relation to the gases.
a. same
c. lateral
b. neutral
d. opposite

Which of the following structures is not found in both plant and animal cells? a) chloroplast b) cytoskeleton c) ribosomes d) mitochondria

Multicellular organisms use cell division, mitosis, for growth and the maintenance and repair of cells and tissues. single-celled organisms may use cell division as their method of reproduction. regardless of the reason for mitosis, the process ensures genetic continuity. what is the step in the cell cycle that ensure genetic continuity?

Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.