M6 Cell Theory Flashcards
Who invented the first composite microscope?
Zacharias Janssen and Hans Martens in 1590.
Who is considered the father of cell biology and what did he discover?
Robert Hooke in 1665, he coined the term “cell” from “celullae.”
What did Anton Van Leeuwenhoek contribute to biology?
He improved the composite microscope and discovered “animacules” (bacteria), becoming the father of microbiology in 1674.
What did Matthias Schleiden and Theodore Schwann conclude?
They concluded that all plants and animals are composed of cells in 1830.
What is Rudolf Virchow’s contribution to cell theory?
He proposed that each cell comes from a previous cell in 1858.
What is the first postulate of cell theory?
Every living organism consists of one or more cells.
What is the basic unit of life according to cell theory?
The cell is the basic unit of life and is alive, even if part of a multicellular organism.
How do living cells arise according to cell theory?
All living cells arise from the division of pre-existing cells.
What do cells pass on to their descendants during reproduction?
Cells contain hereditary material (DNA) which they pass on during the reproductive process.
What are prokaryotic organisms?
Single-celled organisms from the Bacteria and Archaea domains with no nucleus and a simpler structure.
What defines eukaryotic organisms?
Organisms with a nucleus and organelles enclosed in membranes, including unicellular and multicellular life forms.
How do prokaryotic organisms reproduce?
Mainly through asexual reproduction via binary fission.
What type of genetic material is found in eukaryotic organisms?
Multiple linear chromosomes housed in the nucleus.
What does the endosymbiosis theory explain?
It explains the origin of eukaryotic cells through the symbiotic association of prokaryotic cells.
