In the early stages of development all animals start as a single cell… They divide again and again until... gradually a body emerges…with a front, a back, a top and a bottom. important embryos were fish.
<h3>I'm not 100% sure, but I think the answer is choice D</h3>
If you have too few individuals, then the population is not stable meaning it collapses and the species dies off (due to members not able to reproduce at the proper rate/amount).
If you have too many individuals, then the resources are over-consumed and it's not a sustainable model. In other words, there are too many individuals and there isn't enough food, water, etc.
The key is to have a balance so you don't go too low or too high with the population.
Answer: does not have a nucleus
All of the four characteristics (has membrane-bounded organelles, has a nucleus, has a cell wall made of chitin and is at least 10 micrometers in diameter) are properties of eukaryotic cells. Cells that do not have a nucleus are prokaryotic cells.
Vesicles and vacuoles are to store and transport materials in a cell