cell theory Flashcards
What is biology?
Biology is the study of living organisms.
What are cells?
Cells are the fundamental unit of structure and function in all living organisms.
Why are cells vital to life?
Cells are vital to life as they are found in all living organisms, from single prokaryotic cells to the millions of cells that make up animals and plants.
What is the importance of understanding cell structure and function?
Understanding the structure and function of cells is essential to grasp the fundamental concepts of biology.
What is a prokaryotic cell?
A prokaryotic cell is a cell with no true nucleus or nuclear membrane.
What does magnification refer to?
Magnification is the number of times larger the image appears compared to the actual size of the object being viewed.
Who first described cells?
Robert Hooke first described cells in 1665.
What is cell theory?
Cell theory is the concept that cells are the fundamental unit of structure, function, and organization in all living organisms.
What does cell theory state?
Cell theory states that both plant and animal tissue are composed of cells and that cells are the basic unit of life. It also states that cells can only develop from existing cells.
What did Robert Hooke observe in 1655?
Robert Hooke observed the structure of finely sliced cork and described what he saw as ‘cells’.
What did Matthias Schleiden propose in 1839?
Matthias Schleiden suggested that all plant material is composed of cells.
What did Jan Purkyne observe?
Jan Purkyne observed that animal tissue is composed of cells and that the structure is similar to plant tissue.
Who is credited with the Universal Cell Theory?
Theodor Schwann is credited with the Universal Cell Theory, proposing that all living things are composed of cells.
What did Louis Pasteur demonstrate regarding spontaneous generation?
Louis Pasteur demonstrated that bacteria will only grow in sterile nutrient broth after it has been exposed to air, disproving the theory of spontaneous generation of cells.
Who was the first person to observe bacteria?
Anton van Leeuwenhoek was the first person to observe bacteria and protoctista from pond water samples.
