Which formula shows a sandwich with two slices of rye bread (r) and one slice of turkey (t)? rt r2t r2t2 rt2
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Ответ:
Ответ:
Vertebrate. Animals can be classified into two main groups: vertebrates and invertebrates. The main difference between vertebrates and invertebrates is that invertebrates, like insects and flatworms, do not have a backbone or a spinal column. Examples of vertebrates include humans, birds, and snakes.
DIFFERENCES: 1) Vertebrates have a backbone or spinal column, have an internal skeleton made of bone, an advanced nervous system with a developed brain and have outer covering of protective cellular skin. Invertebrates have no backbone, no cell walls. Examples of invertebrates are insects, flatworms, jellyfish, flies.