By 12 weeks, the uterus is just to the level of the and is about the size and shape of a large grapefruit. As the uterus expands, it impinges on the space occupied by the .

x would be the most and the least would be y because there are more fruit   and seeds than flock z has insects

youre right there are

unicellular organisms, like bacteria, are able to perform all life functions within one single cell. multicellular organisms need many different types of cells to carry out the same life processes. each of these special types of cells has a different structure that it perform a specific function.