Which of the following is formed when a group of tissues works together to perform a common function?
a. brain
b. organ system
c. body
d. organ

Due tonight 10 points will mark brain

Which statement best explains why cells were observed in more detail using a compound microscope than a simple microscope? a compound microscope has greater magnification ability than a simple microscope. the compound microscope was invented before the simple microscope. a compound microscope is much easier to manufacture than a simple microscope. compound microscopes were more common than simple microscopes.

Communication and transportation have improved as a result of scientific advancements. select the best answer from the choices provided of mark this and return save and exit next