What was rudolph virchow’s contribution to the cell theory?
a. he concluded that all cells come from preexisting cells.
b. he concluded that cells are the basic units of structure and function of all living things.
c. he concluded that all organisms are composed of cells.
d. he concluded that all cells are similar in composition and metabolic activities.

A: He concluded that all cells come from preexisting cells

Explanation:

The modern cell theory has 3 parts;

The development of the cell theory has the contributions of several scientists but the most noticeable among them are Matthias Scheleiden, Theodore Schwann and Rudolf Virchow.

Rudolf Virchow specifically built on the work of other scientists such as Theodore Schwann and Robert Remak to disprove the theory of spontaneous generation and propound the theory of cells arising from preexisting cells.

The correct answer is A

humans can cause extinction of a species through overharvesting, pollution, habitat destruction, introduction of invasive species (such as new predators and food competitors), overhunting, and other influences. explosive, unsustainable human population growth is an essential cause of the extinction crisis.

explanation:

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