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What does the presence of mitochondria in each cell suggest about multicellular organisms?
It is believed that mitochondria, which have their own independent genetics, became part of cells originally as a symbiotic organism. The fact that they are found in all cells of multi-cellular organisms is a tribute to the usefulness of mitochondria. It may well be that multi-cellular organisms would be impossible without them.
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What does the presence of similar DNA sequences in the genes in very dissimilar organisms imply?
The presence of similar DNA sequences in genes of very dissimilar organisms implies a common ancestry or evolutionary relationship. These similarities suggest that these organisms share a common ancestor and have inherited these sequences through evolution.
Why mitchondria plastids has its own DNA?
There is evidence to suggest that mitochondria were once free-living organisms that were incorporated into an ancestoral eukaryotic cell. Not only do they have their own DNA, but they replicate independantly of the larger host cell replicating.
Homologous structures in organisms suggest that the organisms?
share a common ancestor. These structures are similar in form and function but may have evolved to serve different purposes in different species due to natural selection. The presence of homologous structures supports the theory of evolution.
Why are coliforms used as indicator organisms if they are not usually pathogens?
Coliforms are used as a indicator organism because they are abundant in matrix, easy to find, cost effective. Coliforms has frequently been used in water testing because of all of these benefits.
What did Dr. Lynn Margulis suggest about mitochondria and chloroplasts?
They were cells before and then they came together with a cell and then they became mutually dependent.
What is a living thing composed of many cells?
An organism made up of many cells is called multicellular organism. These organisms have specialized cells that perform different functions, and they can range in size from microscopic to huge, like plants, animals, and fungi.
What does the presence of similar DNA sequences in the genes in very dissimilar organisms imply?
The presence of similar DNA sequences in genes of very dissimilar organisms implies a common ancestry or evolutionary relationship. These similarities suggest that these organisms share a common ancestor and have inherited these sequences through evolution.
Why mitchondria plastids has its own DNA?
There is evidence to suggest that mitochondria were once free-living organisms that were incorporated into an ancestoral eukaryotic cell. Not only do they have their own DNA, but they replicate independantly of the larger host cell replicating.
Homologous structures in organisms suggest that the organisms?
share a common ancestor. These structures are similar in form and function but may have evolved to serve different purposes in different species due to natural selection. The presence of homologous structures supports the theory of evolution.
What similarities in the early development of organisms suggest?
ansector
Why are coliforms used as indicator organisms if they are not usually pathogens?
Coliforms are used as a indicator organism because they are abundant in matrix, easy to find, cost effective. Coliforms has frequently been used in water testing because of all of these benefits.
What does the presence of homologous structure in different organisms suggest?
The presence of homologous structures, such as the vertebral column in vertebrates, suggests the presence of a common ancestor. Learn more at 23andme.com.
What did Dr. Lynn Margulis suggest about mitochondria and chloroplasts?
They were cells before and then they came together with a cell and then they became mutually dependent.
Does presence of acid fast organisms in a clinical specimen always suggest serious clinical disease?
Acid fast organism in sputum suggest that the patient is having the pulmonary tuberculosis. This is potentially treatable condition. When this organism is found in skin scrapping, it indicates that the person may have leprosy. This is mild disease of low virulence. In both the cases you have to take treatment for long period.
What proof do you have that living things are similar when viewed through a microscope?
When living things are viewed through a microscope, similarities can be observed in their basic cellular structure, such as the presence of cell membranes, cytoplasm, and organelles like nucleus and mitochondria. Additionally, the genetic material in cells, notably DNA, exhibits similarities across different living organisms. These shared characteristics suggest a common evolutionary origin for all living things.
Which ideas do NOT support the cell theory?
Any ideas that suggest non-living things can form from cells, disprove the presence of cells in living organisms, or reject the basic unit of life being the cell would not support the cell theory. Additionally, beliefs that cells are not fundamental to the functions and structures of living organisms would also not align with the cell theory.
How does the symbiosis theory prove to have DNA inside the mitochondria?
Mitochondria--small organelles found in eukaryotic cells that produce ATP--are believed to have become part of the eukaryotic cell by a process of symbiosis. This theory is supported by the fact that mitochondria have their own DNA, separate and distinct from that of the cell in which they reside. Even more compelling is the fact that mtDNA is found in the same form as DNA in prokaryotes such as bacteria. DNA in eukaryotes (animals, plants, fungi) comes in the form of long strings. It has two distinct ends and eukaryotes usually have several of these strings (chromosomes). DNA in prokaryotes, on the other hand, comes in a circular form. It is referred to as ccc-DNA, or covalently closed circular DNA. Prokaryotes typically only have one circular chromosome. The DNA found in mitochondria is ccc-DNA, rather than the eukaryotic type. This, and the fact that it is distinct from the DNA of the cell in which it is found, both suggest that mitochondria were once unique organisms that merged with other organisms via symbiosis to become one type of cell.
