tyliyahmiles99
07.07.2019 •
Biology
Try your best to answer 60 describe the degree of cephilization shown by cnidarians, flatworms, octopi, and vertebrates. here is some information to you: animals that have bilateral symmetry often show cephalization. cephalization (sef-uh-lih-zay-shun) is the concentration of sensory neurons and interneurons into a "head." certain flatworms and roundworms have some cephalization. cephalopod mollusks, such as optopi and squid have more developed cephalization. so do many arthropods. in these animals, interneurons form ganglia throughout the body. the largest ganglia, called cerebral ganglia, are found in the head. : )
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Ответ:
The degree of cephalization shown by Cnidarians, flatworms, octopi, and vertebrates;
Cnidarians have no cephalization (nerve net); flatworms have some cephalization (ganglia); Octopi and vertebrates have higher degrees of cephalization (ganglia and brain). Cephalization is an evolutionarytrend in which, over many generations, the mouth, sense organs, and nerve ganglia become concentrated at the front end of an animal, producing a head region.
Ответ:
the first layer was the crust