Answer:
A. engulfing of small photosynthetic prokaryotes by larger cell
Explanation:
The endosymbiotic theory states that some of the organelles in today's eukaryotic cells were once prokaryotic microbes. In this theory, the first eukaryotic cell was probably an amoeba-like cell that got nutrients by phagocytosis and contained a nucleus that formed when a piece of the cytoplasmic membrane pinched off around the chromosomes. Some of these amoeba-like organisms ingested prokaryotic cells that then survived within the organism and developed a symbiotic relationship.
Some Evidence for this is based on the following:
1. Chloroplasts are the same size as prokaryotic cells, divide by binary fission, and, like bacteria, have Fts proteins at their division plane.
2. The mitochondria are the same size as prokaryotic cells, divide by binary fission, and the mitochondria of some protists have Fts homologs at their division plane.
3. Mitochondria and chloroplasts have their own DNA that is circular, not linear.
4. Mitochondria and chloroplasts have their own ribosomes that have 30S and 50S subunits, not 40S and 60S.
5. Several more primitive eukaryotic microbes, such as Giardia and Trichomonas have a nuclear membrane but no mitochondria.
"Meiosis" is the process that <span>maintains a constant number of chromosomes within a species
Hope this helps!</span>
The correct answer is 5′ to 5′ triphosphate linkage.
<span>mRNA capping is the posttrancriptional modification of messenger RNA when the nucleotide on the 5′ end is specially altered. The process is highly regulated and it creates stable and mature messenger RNA able to undergo translation. The cap on the <span>5’ end of mRNA consists of a guanine nucleotide connected to mRNA via an unusual 5′ to 5′ triphosphate linkage. Guanosine is methylated on the position 7 after capping.</span></span>
Answer:
the photons coming from sunlight
Explanation:
In an ecosystem material is recycled and energy is provided then transferred but never recycled.