How can we use the fossil record to show how whales envolved from (now) extinct terrestrial and aquatic organisms?

What is the next step in muscle contraction after the actin changes shape? (apex)

Astudent analyzed ears of corn that demonstrated two traits in the f2 kernels, purple or white colors and smooth on wrinkled shapes. a tabulation of 135 individual kernels gave the following results: purple and smooth = 75 white and smooth = 28 purple and wrinkled = 24 white and wrinkled = 8 what would be the only phenotype present in the f1 ger

Why is it important to study each branch of earth science?