In biology, cell theory is a scientific theory which describes the properties of cells.
These cells are the basic unit of structure in all organisms and also
the basic unit of reproduction. With continual improvements made to microscopes
over time, magnification technology advanced enough to discover cells
in the 17th century. This discovery is largely attributed to Robert Hooke, and began the scientific study of cells, also known as cell biology.
Over a century later, many debates about cells began amongst
scientists. Most of these debates involved the nature of cellular
regeneration, and the idea of cells as a fundamental unit of life. Cell
theory was eventually formulated in 1839. This is usually credited to Matthias Schleiden and Theodor Schwann. However, many other scientists like Rudolf Virchow
contributed to the theory. Cell theory has become the foundation of
biology and is the most widely accepted explanation of the function of
cells.
The three tenets to the cell theory are as described below:
<span><span>All living organisms are composed of one or more cells. (However,
this is considered a controversy because non-cellular life such as
viruses are disputed as a life form. See Non-cellular life.)</span>The cell is the basic unit of structure and organization in organisms.<span>Cells arise from pre-existing cells.</span></span>
The Calvin cycle is called the dark cycle because it does not require
light to proceed. Unlike light reactions, the Calvin cycle is a
light-independent reaction, which means it can and will occur in the
dark as well as the light. The Calvin cycle is called the dark cycle
because it does not require light to proceed.
hope this helps :p
Primary consumer because rabbit is a hervibore, which feed on plant. Rabbits eat vegetables.