Which characteristic of four different dinosaur fossils makes a dinosaur most similar to the present-day birds? flexible wrist flapping ability flight feathers primitive feathers

the answer would be 2, if crossing over doesn’t occur 2 out of 4 of the daughter cells will have that allele.

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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.