⚠️please help ASAP, this is a one of the last questions for a very important test I’m taking and I would like to make sure my answer is correct What did sharks and
rays develop that
their ancestors did
not have?
A. lobes that were the beginnings of arms and legs
B. jaws that helped with catching prey
C. legs to be able to survive on land
D. amniotic eggs

i believe its D, amniotic eggs.

Explanation:

as long as you live in good ole merica kangaroos dont matter partner

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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.