The appropriate response is A. Gastrulation is a stage ahead of schedule in the embryonic improvement of most creatures amid which the single-layered blastula is rearranged into a trilaminate (three-layered) structure known as the gastrula. These three germ layers are known as the ectoderm, mesoderm, and endoderm.
Answer:
278
Explanation:
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Answer:
They require the cleanest water for survival as well as high levels of dissolved oxygen. In particular, mayflies (Ephemeroptera), stoneflies (Plecoptera) and caddisflies (Trichoptera) are the most sensitive to changes in water quality
Explanation:
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