The picture shows 4 different types of Point Mutations, what type of Point Mutation is letter A?

Which of the following will not cause mass extinction? a. drastic change is weather b. geological change c. both a and b d. none of the above

When analyzing tree rings, what do scientists assume a thin ring indicates?

How does the diagram explain ocean currents? earth tilt 23.5 degreesquestion 1 options: earth's tilt causes uneven heating of earth which causes currents. earth's tilt causes the ocean to move because of gravity. earth's tilt and its rotation cause currents. earth's tilt causes uneven distribution of salt which causes currents.