Which group or lineage of Echinoderms contain sessile species and motile species? a. Holothuroidea
b. Crinoidea
c. Asteroidea
d. Echinoidea
e. None of the above

i'll try what topic lol

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what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.

i know can you plzz me with this question im sorry i didt answer your question i just need hel.