Galaxy is a whole bunch of planets rocks and stars in one galaxy.
A solar systom is when the other planets rotate around the main one. For example the galaxy that earth is located in is called the Milky Way and see there are many planets and rocks in this galaxy.
Answer: Gadsden Purchase, 1853–1854. ... Gadsden's Purchase provided the land necessary for a southern transcontinental railroad and attempted to resolve conflicts that lingered after the Mexican-American War .
Explanation:
Germ layers form during the <u>germinal </u>period while organ systems mature during the <u>fetal</u> period.
The endoderm (inner layer), ectoderm (outer layer), and mesoderm are the three major cell layers that make up the germ layer. They arise in the early stages of embryonic development (middle layer).
The first two weeks following conception are known as the germinal stage, followed by the embryonic phase from the third to the eighth week, and the fetal period, which lasts from the ninth week until delivery.
A variety of procedures take place during the germinal stage to transform an egg and sperm first into a zygote and later into an embryo. The procedures include implantation, blastulation, cleavage, and fertilisation.
To learn more about Germ layers, refer
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(32/9)^4= 159.819541. hope this helps
