14. If all cells are created by other living cells, which of the following is true a. Spontaneous generation cannot occur. b. Plant cells come from other plant cells. c. Cells divide for reproduction. d. All of the answers are correct.14. If all cells are created by other living cells, which of the following is
true
a. Spontaneous generation cannot occur.
b. Plant cells come from other plant cells.
c. Cells divide for reproduction.
d. All of the answers are correct.
Answers
Answer:
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Explanation:
Cell Theory
The microscopes we use today are far more complex than those used in the 1600s by Antony van Leeuwenhoek, a Dutch shopkeeper who had great skill in crafting lenses. Despite the limitations of his now-ancient lenses, van Leeuwenhoek observed the movements of protista (a type of single-celled organism) and sperm, which he collectively termed “animalcules. ”
In a 1665 publication called Micrographia, experimental scientist Robert Hooke coined the term “cell” for the box-like structures he observed when viewing cork tissue through a lens. In the 1670s, van Leeuwenhoek discovered bacteria and protozoa. Later advances in lenses, microscope construction, and staining techniques enabled other scientists to see some components inside cells.
image
Figure 4.1C.1 : Structure of an Animal Cell: The cell is the basic unit of life and the study of the cell led to the development of the cell theory.
By the late 1830s, botanist Matthias Schleiden and zoologist Theodor Schwann were studying tissues and proposed the unified cell theory. The unified cell theory states that: all living things are composed of one or more cells; the cell is the basic unit of life; and new cells arise from existing cells. Rudolf Virchow later made important contributions to this theory.
Schleiden and Schwann proposed spontaneous generation as the method for cell origination, but spontaneous generation (also called abiogenesis) was later disproven. Rudolf Virchow famously stated “Omnis cellula e cellula”… “All cells only arise from pre-existing cells. “The parts of the theory that did not have to do with the origin of cells, however, held up to scientific scrutiny and are widely agreed upon by the scientific community today. The generally accepted portions of the modern Cell Theory are as follows:
The cell is the fundamental unit of structure and function in living things.
All organisms are made up of one or more cells.
Cells arise from other cells through cellular division.
The expanded version of the cell theory can also include:
Cells carry genetic material passed to daughter cells during cellular division
All cells are essentially the same in chemical composition
Energy flow (metabolism and biochemistry) occurs within cells
If all cells are created by other living cells, then d. All of the answers are correct.
All cells are created by other living cells. This is a part of the statement of cell theory along with the other one-
All living organisms comprise cell and cell products.
The following statements are true:
a. Spontaneous generation cannot occur.
Cell theory says all cells derive from pre-existing cells only. Hence, spontaneous generation cannot occur.
b. Plant cells come from other plant cells.
As cells arise from pre-existing cells, plant cells come from other plant cells only.
c. Cells divide for reproduction.
For reproduction, cells divide and new cells come into existence.
d. All of the answers are correct.
As each of the given statements is correct, this will be the correct option.