How do scientists know about the structure of the earth? Question 21 options:

We have drilled all the way to the core of the earth.

We have drilled far enough into the earth to reach the mantle.

S waves from earthquakes can travel through both solids and liquids so they tell us what is inside the earth.

P waves from earthquakes can travel through both solids and liquids so they tell us what is inside the earth.

What function does a limb serve in each animal how are the limb bones of the four animal similar based on the similarities what can be inferred about the evolution of the poor animals

Which is essential for finding the biomass of spinach

Which survival need shortage would most affect articular cartilage's ability to rebound after joint compression, and why does it have this effect? which survival need shortage would most affect articular cartilage's ability to rebound after joint compression, and why does it have this effect? nutrients, since the majority of cartilage is made out of polysaccharide glycosaminoglycans (gags). water, since it makes up to 80% of cartilage's content and cushion articular bone surfaces. normal body temperature, since higher temperatures would slow down necessary biochemical reactions. oxygen, since cartilage cells receive this gas directly from nearby blood vessels?