A good example of endosymbiosis is the mitochondria. Three pieces of evidence that suggest the mitochondria was not an original organelle in cells are:
1. They have their own membranes
2. They reproduce by pinching in half which is very similar if not the same to binary fission of bacteria
3. They have their own genomes which are passed off to the offspring.
The 2nd and 4th answer choices sound the best to me. I personally would go for the 2nd one, explaining that the fossils of fish K and fish R and Y are similar. If you get the question wrong, I am VERY sorry. :(
<span>This is the phosphorus and carbon cycle. By breaking down dead carbon-containing objects and returning them to the soil, these bacteria are able to allow the nutrients to be re-used by future generations of plants and animals, continuing the cycle.</span>
Answer:
The somatic cells of fruit flies contain eight chromosomes, which means they have two sets of four chromosomes. Meiosis is the process by which sex cells are produced. Sex cells are haploid, which means they have one set of chromosomes.
Explanation: