Earth Science Choose the statement about the Doppler Effect that is true
It occurs when a wave source moves towards an observer.
It occurs when an observer moves towards a wave source.
It occurs when a wave source moves away from an observer.
It occurs when an observer moves away from a wave source.
All the above are true

What is a codon and where is it found

Plz ! a frog has a genetic mutation in skin cells that causes part of its skin to turn orange the frog will not pass this genetic mutation onto its offspring because, a. the offspring will inherit skin cells from the other parent. b. mutated skin cells cannot divide and produce daughter skin cells. c. skin cells do not contribute genetic material to sex cells. d. parents do not contribute genetic material to their offspring.

Nephrons, the functional unit of kidneys, are responsible for formation of urine. the sentences describe situations that are the result of problems in the urine formation process. for the nephron shown below, match each situation to the step in the urine formation process where the problem lies.