Which of these germinal layers give rise to the digestive system, the circulatory system, and the nervous system? . . endoderm, mesoderm, and ectoderm, respectively . . mesoderm, ectoderm, and endoderm, respectively . . ectoderm, endoderm, and mesoderm, respectively .

The correct answer is endoderm, mesoderm, and ectoderm respectively.

Explanation:

During gastrulation stage three-layered germinal layers forms in triploblastic animals. The three layers are known as - outer layer ectoderm, middle layer mesoderm, and the inner layer endoderm.

Later on, the digestive system rises from the endoderm, mesoderm rises to the circulatory system, and ectoderm differentiates to form the nervous system.

Thus the correct answer is Endoderm, mesoderm, and ectoderm respectively.

a- all cells come from pre-existing cells

question: which statement best describes the different properties of metals?

answer: they are shiny and bend without breaking.

since metals have certain characteristics properties, they include the following: they are ductile, malleable, shiny, hard, lustrous, flexible and they are good conductor of heat and electricity. so therefore, metals are not dull and they are not non-flexible as listed. instead, they are shiny and flexible.

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