Answer:
This question lacks options, the options are;
A. All cells have a cell wall.
B. All cells arise from pre-existing cells.
C. All cells are capable of photoshynthesis.
D. All cells can develop into any other type of cell.
The answer is B.
Explanation:
The widely accepted universal cell theory is known to be contributed to by three scientists viz: Matthias Schleiden, Theodor Schwann and Rudolph Virchow.
As rightly stated in this question, Botanist Mathias Schleiden and Zoologist Theodor Schwann proposed that plants and animals are made up of cells in the year 1838 and 1839 respectively. However, in 1855, biologist Rudolph Virchow expanded the cell theory by adding that all living things are composed of cells and that these cells arise from pre-existing cells.
The collaboration of these three scientists brought about the cell theory that states:
* Cells are the basic unit of all living things.
* All living things are made up of one or more cells.
* All cells arise from pre-existing cells.
The largest reservoir of Nitrogen on earth is THE ATMOSPHERE. Nitrogen found in the atmosphere is known to be the Dinitrogen gas (N₂), and it makes up as much as 78% of all the gases in the dry air (atmosphere).
So, whichever arrow points to the atmosphere is your right answer.
Answer: Cell division' is the process in which a 'cell' divides into 'two' or more cells. This process is known as mitosis that allows for continuous construction and repair of the cells of the body thereby facilitating growth
6 I think but I might be wrong
Answer:
Decomposition.
Explanation:
Decomposition is simply a breakdown process of raw organic materials to a finished compost. This is a gradual complex process, in which both chemical and biological processes has to be in order for organic matter to form compost.
The decomposition that occurs organic matter by biological action takes place in nature since life first appeared on our planet. Lately, man has attempted to control and directly utilize the process for sanitary recycling and reclamation of organic waste material.
The two forms of decomposition are:
ANAEROBIC (without oxygen) decomposition.
AEROBIC (with oxygen) decomposition and stabilization.
In both of these processes, bacteria, fungi, molds, protozoa, actinbacteria, and other saprophytic organisms feed upon decaying organic materials initially, while in the later stages of decomposition mites, millipedes, centipedes, springtails, beetles and earthworms further breakdown and enrich the composting materials. The organisms will vary in the pile due to temperature conditions, but the goal in composting is to create the most favorable environment possible for the desired organisms.