Many cells.
It is made of trillions of cells just a you and me.
The species inside the animal kingdom are example organisms that do not have cell walls. This includes reptiles, birds and mammals.
All whales are mammals, just like you. And just like you they are eukaryote.
The cell wall is located just outside the cell membrane of plant cells. The cell wall is made of a substance called cellulose and is not found in animal cells.
Cells come from other cells. However they are not made of cells. They are made of organelles and cytoplasm.
a plant leaf does not have just one cell. it has multiple cells, that is what plants are made of.
They are any cells forming the body of an organism, as opposed to germline cells. In mammals, germline cells (also known as "gametes") are the spermatozoa and ova which fuse during fertilization to produce a cell called a zygote, from which the entire mammalian embryo develops. Every other cell type in the mammalian body-apart from the sperm and ova, the cells from which they are made (gametocytes) and undifferentiated stem cells-is a somatic cell: internal organs, skin, bones, blood, and connective tissue are all made up of somatic cells.
Cancer isn't really a specific cell it is just the inability for some cells to stop reproducing.
cells
The cell membrane is a part of a cell; specifically, it is the outermost layer, or effectively the skin of the cell. It is not made up of cells. A cell is not itself made up of cells, that would entail an infinite regression.
The animal cell doesn't have a cell wall, just a cell membrane. However, plant cells have cell walls, and those are made of a rigid layer of nonliving material, cellulose.
A tree is made of cells that have cell walls.