It was used by Hubble to measure velocities of galaxies
Answer:
I have attached a PDF. Please look at that and it will answer all your questions!
CT scans. I hope this is the answer you're looking for
Answer:
struggle for existence
survival for the fittest
Explanation:
In struggle for existence, members of the species die due to competition among individuals for food. The better suited giraffes with long necks could feed on the trees and survived.
In survival for the fittest, the well adapted long-necked giraffes were able to survive and reach the reproductive age to pass over their desirable traits to their offspring.
