Answer:
divide and add the exponents
Explanation:
Use KhanAcademy. my teachers often tell me its a good website to start practicing. it has all subjects.
The structure that consists of ectodermal contributions is; all neural tissue, including the brain and spinal cord
<h3>What are the structures of ectodermal contributions?</h3>
Ectodermal organs include hair, teeth, and many exocrine glands. They originate from two adjacent tissue layers: the epithelium and the mesenchyme.
Similar sequential and reciprocal interactions between the epithelium and mesenchyme regulate the early steps of development in all ectodermal organs.
The main function of the ectoderm is to form the central nervous system (brain and spinal cord). Following gastrulation, the mesoderm forms the rod-like notochord which signals the adjacent dorsal ectoderm to thicken and form the neural plate.
Thus, the structure that consists of ectodermal contributions is all neural tissue, including the brain and spinal cord
Complete question is;
Which structures consist of ectodermal contributions?
A) all neural tissue, including the brain and spinal cord
B) all components of the lymphatic system
C) urinary bladder and distal portions of the duct system
D) all components of the muscular system
Read more about central nervous system at; brainly.com/question/14260811
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All of these seem like reasonable answers, but I myself would go with A :)
