Cell Flashcards
(16 cards)
What is cellular organization?
Cellular organization is found in all living things.
What are unicellular organisms?
Unicellular organisms are made up of only one cell, such as Bacteria, Amoeba, Paramecium, and Chlamydomonas.
What are multicellular organisms?
Multicellular organisms are formed of millions of cells, including plants, animals, and humans.
What serves as structural and functional units in living beings?
Cells serve as structural and functional units in all living beings.
Who discovered cells and what did he name them?
Robert Hooke discovered cells in 1665 and named them ‘cellulae’ or ‘cells’.
Who was the first to see and describe a living cell?
Anton Von Leeuwenhoek was the first to see and describe a living cell.
Who discovered the nucleus in a cell?
The nucleus in a cell was discovered and named by Robert Brown.
Who coined the term protoplasm?
J. E. Purkinje coined the term protoplasm to describe the living substance inside the cell.
Who are credited with the cell theory?
Cell theory is credited to M.J. Schleiden and T. Schwann.
What did Schleiden propose about tissues?
Schleiden proposed that all tissues are composed of individual cells.
What did Schwann say about plants?
Schwann said that all plants are composed of cells.
What is the joint concept developed by Schleiden and Schwann?
They developed the concept that all living organisms are created by cells and cell products.
What limitation did the original cell theory have?
The original cell theory did not clarify how new cells were developed.
What are viruses, viroids, and prions in relation to cell theory?
Viruses, viroids, and prions are obligate parasites that deny the cell theory.
Who explained that new cells are produced from pre-existing cells?
Rudolf Virchow explained this in 1855 with the phrase ‘Omnis cellula-e cellula’.
How did Virchow modify the cell theory?
Virchow modified Schleiden and Schwann’s hypothesis to give the cell theory a complete form.
