Which of the following adaptations to life on land is found in both insects and modern reptiles?
a.
two pairs of walking legs

b.
tracheae to distribute oxygen

c.
body surfaces that resist evaporation

d.
metamorphosis from a larval form

e.
ability to fly

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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.