What are the evidences for primary endosymbiosis?
Numerous lines of evidence exist, including that mitochondria and chloroplasts have their own circular DNA (prokaryotes also have circular DNA), mitochondria and chloroplasts have a double membrane (the inner membrane would have initially been the ingested prokaryote’s single membrane, and the outer membrane initially …
Why is endosymbiosis Important provide evidence?
Endosymbiosis is important because it is a theory that explains the origin of chloroplast and mitochondria. It is also a theory that explains how eukaryotic cells came to be.
Which of the following pieces of evidence best supports the endosymbiotic theory?
Which piece of evidence best supports the endosymbiotic theory of organelle evolution? The outer membrane of a mitochondrion and chloroplast resemble a eukaryotic cell while the inner membrane resembles that of a bacterial cell.
What evidence supports the theory that Chlorarachniophytes evolved from secondary endosymbiosis?
Several lines of evidence support that chlorarachniophytes evolved from secondary endosymbiosis. The chloroplasts contained within the green algal endosymbionts still are capable of photosynthesis, making chlorarachniophytes photosynthetic. The green algal endosymbiont also exhibits a vestigial nucleus.
What are three pieces of evidence that support the endosymbiotic theory?
10 Best Evidence of Endosymbiotic Theory
- i) Presence of DNA:
- ii) Size of Ribosomes:
- iii) Inhibition by antibiotics:
- iv) Evolutionary relationship:
- v) Same size:
- vi) Plasma-Membrane:
- vii) Enzyme secretion:
- viii) Replication and protein synthesis:
Which of the following structures in Chlorarachniophytes provides evidence that they evolved through the endosymbiosis of a green alga by a heterotrophic eukaryote?
Which of the following structures in chlorarachniophytes provides evidence that they evolved through the endosymbiosis of a green alga by a heterotrophic eukaryote? Mitosomes in diplomonads lack a functional electron transport chain and other eukaryotes possess one.
What is evidence that some chloroplasts arose by secondary endosymbiosis?
How do you distinguish between primary and secondary endosymbiosis?
The main difference between primary and secondary endosymbiosis is that primary endosymbiosis is the engulfing and absorbing a prokaryotic cell by a eukaryotic cell, whereas secondary endosymbiosis is the engulfing and absorbing of a eukaryotic cell by another eukaryotic cell that has already undergone primary …
What is endosymbiotic evidence of evolution?
Evidence for Endosymbiosis Mitochondria and chloroplasts are both organelles suggested to have arisen via endosymbiosis. Evidence that supports the extracellular origins of these organelles can be seen by looking at certain key features: Membranes (double membrane bound) Antibiotics (susceptibility)
Which of the following structures in Chlorarachniophytes provides evidence that they evolved through the endosymbiosis?
Why are cryptophytes and chlorarachniophytes of special interest in secondary endosymbiosis?
As mentioned above, the cryptophytes and chlorarachniophytes are of special interest with respect to the study of secondary endosymbiosis. This is because they are the only two lineages in which the nucleus of the engulfed algal cell still exists inside the new host.
What is the evidence for endosymbiotic theory?
Like bacterial binary fission, mitochondria and chloroplast also replicate their genome and divide into two new organelles. The electron transport chain is one of the most important evidence of endosymbiotic theory.
Is the haptophyte endosymbiont a secondary plastid?
For example, the haptophyte endosymbiont of Karlodiniumand Kareniahas been reduced to a similar extreme as most secondary plastids, so that all that remains is the plastid itself, and perhaps some additional membranes (Tengs et al. 2000).
How does endosymbiosis affect plastid evolution?
Tertiary endosymbiosis also presents another wrinkle in the evolution of plastid proteins because, in these events, a new plastid is introduced into a lineage that is already photosynthetic, or at least had photosynthetic ancestors and might have retained a cryptic plastid.