Four important discoveries are listed below: 1. Some animals can regrow their limbs.
2. All plant and animal tissues are made up of cells.
3. Dominant and recessive traits are passed from parents to offspring.
4. Chromosomes replicate during cell division.
What two discoveries required the use of the microscope?
A 1 and 2
B 2 and 4
C 1 and 3
D 3 and 4