Answer:
Though huge, the Pacific is getting smaller. It was once much wider when all the continents were joined together in the supercontinent, Pangea. The Pacific ocean basin is getting smaller because the Atlantic Ocean is opening and North America and South America are moving westward.
Answer:
D. a wide variety of gradual and sudden changes to ecosystems
Explanation:
There have been different global climatic changes throughout the history of planet earth. The changes have been gradual or abrupt and have been due to various causes, such as those related to changes in orbital parameters, precession , variations in solar radiation, continental drift, periods of intense volcanism, meteorite impacts etc. Some changes to the ecosystems related to climatic changes are, for example,The Cretaceous-Tertiary extinction (which probably caused the extinction of the dinosaurs), the contraction of the forests during the last glacial maximum promoting biological diversification, the melting of the polar caps increasing sea level etc.
White blood cells (if need more specific answer, probably macrophages)
Answer:
C, both a and b
Explanation:
Momentum is something you gain, meaning it can be transferred from one object to another. When you slow down, that is your momentum being lost, meaning both and and b are correct
Water can pass throught the cell membrane because, the cell membrane has little holes in the membrane allowing water to go through
