How has charles darwin contributed to the study of evolution?
a)he proposed the theory of natural selection.
b)he excavated and studied fossils.
c)he was the first one to use a 3-d printer.
d)he proposed the genetic relationship between species.

B. He excavated and studied fossils. is the answer. I just took a quiz with this question on it and passed it.

Robert Hooke

Theodor Schwann

Bacteria

Unicellular has one cell and multicellular has more than one cell

5

The basic building blocks of all living things

Microscope

living organisms are made up of cells, that they are the basic structural/organizational unit of all organisms, and that all cells come from pre-existing cells.

Virchow used the theory that all cells arise from pre-existing cells to lay the groundwork for cellular pathology

He created the single lens microscope,he did a lot a research on small animals such as fleas. He helped disprove the theory of spontaneous generation.