Cell theory Flashcards
What is the basic unit of life according to cell theory?
The cell.
True or False: All living organisms are composed of one or more cells.
True.
Fill in the blank: According to cell theory, all cells arise from __________.
pre-existing cells.
Who were the scientists that developed the cell theory?
Matthias Schleiden, Theodor Schwann, and Rudolf Virchow.
What does the first tenet of cell theory state?
All living organisms are made up of cells.
What is the second tenet of cell theory?
The cell is the basic unit of structure and function in living organisms.
What does the third tenet of cell theory explain?
All cells arise from pre-existing cells.
True or False: Viruses are considered cells.
False.
What type of microscope was essential for the development of cell theory?
Light microscope.
Multiple choice: Which of the following is NOT a component of cell theory? A) All cells arise from pre-existing cells B) Cells are the basic unit of life C) Cells can spontaneously generate D) All living things are composed of cells.
C) Cells can spontaneously generate.
Short answer: What role did Rudolf Virchow play in the development of cell theory?
He proposed that all cells arise from existing cells.
Fill in the blank: The cell theory is foundational to the field of __________.
biology.
What is one implication of cell theory for the study of living organisms?
It implies that understanding cells is essential for understanding life.
True or False: The cell theory applies only to multicellular organisms.
False.
What type of organism is made up of a single cell?
Unicellular organism.
Multiple choice: Which of the following is a prokaryotic cell? A) Plant cell B) Animal cell C) Bacterium D) Fungi.
C) Bacterium.
What distinguishes eukaryotic cells from prokaryotic cells?
Eukaryotic cells have a nucleus and membrane-bound organelles.
Fill in the blank: The study of cells is known as __________.
cytology.
Short answer: How did the discovery of the cell theory change biological sciences?
It established cells as the fundamental unit of life, guiding research and understanding in biology.
True or False: All cells have a cell wall.
False.
What is a common characteristic of all cells?
They all contain genetic material (DNA).
Multiple choice: Which of the following structures is found in plant cells but not in animal cells? A) Nucleus B) Cell membrane C) Cell wall D) Ribosomes.
C) Cell wall.
Fill in the blank: The __________ was developed in the 19th century and laid the groundwork for modern cell theory.
microscope.
What is the significance of the cell membrane?
It regulates what enters and exits the cell.
Short answer: How does cell theory relate to the concept of evolution?
Cell theory supports the idea that all life forms share a common cellular origin, which is a key concept in evolution.
