hollow ball of cells formed after a fertilized cell undergoes cell division
Explanation:
Blastocyte is the name given to a hollow structure, originating from cell divisions that occur after fertilization. It is an embryo 5 or 6 days old (in some cases 7 days) and composed of approximately 200 cells.
Compared to embryos with fewer days, this embryo has a more differentiated cellular structure, composed of a central cavity (blastocele cavity) and two cell types: the <u>trophoectoderm</u> cells (which later will develop and form the placenta) and the cells of the <u>internal</u> <u>mass</u> (which will form the fetus).
The blastocyst represents the stage of embryonic development prior to implantation in the womb.
All of the above! A healthy soil ecosystem needs fungi, bacteria, and nematodes in order to properly function, especially in the aspects concerning decomposition!<span />
Explanation: don’t mind the volume, look at the surface area-to-volume ratios because they affect the efficiently of a cell to obtain nutrients and eliminate waste.
