One of the factors that threatens biodiversity is deforestation. Deforestation threatens biodiversity because it is destroying the habitats of many animals and without their habitats, the animals die. One way biodiversity can be preserved is to limit deforestation. On a small scale, an individual can help to do this by reusing their paper bags so that is a less demand for paper and as a result, trees to be cut down.
Answer: excessive accumulation of endolymph <span><span> M</span>énière disease is a disorder affecting one ear (inner ear) that shows clinical manifestations of vertigo, tinnitus, hearing loss, and sensations of fullness in the ear. <span>It is an excessive accumulation of endolymph in the membranous labyrinth</span></span>
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.
The stage of mitosis where the chromosomes line up is called metaphase.
DNA located on the chromosomes which are found inside the cell's nucleus
