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.
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Explanation:
They built networks of ditches to irrigate the desert. They cleared forests to make room for farmland. ... The Ancestral Puebloans lived in a very wet climate while the Mississippians lived in a very dry climate
Answer:
The composition of most minerals are within two or more elements, pure elements are made of one element.
Explanation:
Whether those in power are viewed as having the right to Govern others is called : Legitimacy
Generally, voter participation in the United States : C. Increase with age
The younger blood on the United sates tend to be less interested in political matters since they do not necessarily feel the impact or the burden yet.
Answer is C
Explanation: Due to the fact that Behaviour is what defines humans and what we do, an evolutionary approach to studying animal behavior gives us insight into shared traits and features between animals and humans, which further help in understanding human behaviour and how it shapes the human society.
For example, addition and courtship can be learnt from studying flies, while the sociality can be learnt from monkeys and wolves.
