Answer: Gray whales are the common ancestor of the Blue and Humpback whales.
Ancestors of Blue whale include: Gray?
This is true , trees loose their leaves as a part of growth, also in seasons they loose leaves.
Molten material is allowed to solidify into the final shape.
Casting defects occur during solidification:
Gas porosity
Shrinkage
Two stages of solidification:
Nucleation
Growth
If your decreasing the size of something spinning your also decreasing the amount it spins so it would be spinning slower !
