When usingthe standard proteins it is typically assumed that the vv values of thestandard and actually measured protein are identical. With thisassumption, the ratio of the molecular masses of the two proteins isidentical to the ratio of their I(0)s normalized against the concen-trations.
The gametes (an egg and a sperm) fuse in the process of syngamy to form a 2 n zygote. The zygote divides mitotically to form a multicellular embryo ( embryogenesis), which is protected by either gametophytic tissues (such as remnants of archegonia in the nonseed land plants) or sporophytic tissues (the seed in the seed plants). An embryo,...
embryonic layer, one of the three layers of cells in the embryo: the endoderm, the mesoderm, and the ectoderm. From these layers of cells arise all of the structures and organs and parts of the body. The endoderm and the ectoderm are the first to develop. During the third week of gestation the mesoderm arises between the ectoderm and the endoderm.