To my understanding the basic function of the primitive streak is to provide a pathway for pluripotent cells to migrate to different areas of the embryo. This is how neural tubes are formed, leading to neural folds and the neural groove. Which eventually gives rise to the formation of the brain, spinal cord and the autonomic portion of the peripheral nervous system. However if it wasn't for the primitive streak, the formation of the embryo itself would be impossible since everything comes from pluripotent cells. I guess the "function" just depends on on what part of development you are referring to.
In higher animals, it is part of the early stage of development for an embryo. The "primitive streak" is a line of cells stretching from the exterior of the embryonic disc to the center. It divides the cell into left and right portions (bilateral symmetry) and allows the migration of cells that will form the three germ layers of the embryo (endoderm, mesoderm, ectoderm).
It is as primitive as a cave man.
Tigers don't live in groups. They only seek out another tiger when they mate. Lions live in groups called a pride. A female tiger and her cubs are called a streak, but tigers in the wild are basically solo animals.
Streak color is used as an indicator in mineral identification. Slate is a rock composed of various types of minerals.
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Neither. A group of tigers is called a streak.
primitive streak
Primitive streak
what is the streak of sedimentary rocks
there is no name for the color, but there is the "streak" of a mineral, meaning the color of its streak.
The lack of a streak would indicate that the mineral is harder than the streak plate, or the color of the streak is the same as the color of the streak plate.
Primitive is spelled the way you spelled it: primitive.
Diamonds Have No Streak AT All..
a streak a streak
it silver but it does have a streak
its streak is white.
Streak
Diamond will not leave a streak on a porcelain streak plate because diamond is harder than the streak plate. It will leave a scratch on the streak plate for the same reason.