Answer:
D. They float on convection currents in the mantle.
Explanation:
Yes, the pterosaurs is the ancestor of the bird.
I belive its C
Explatatiom burning something is chemical and melting something is physical.
Answer:
Lipid emulsification.
Explanation:
Lipid emulsification generally defined as the spread of one form of liquid into second immiscible form of liquid with hydrophobic, or electrostatic, or hydrogen bonding interaction.
The above scenario is about lipid emulsification in which bile salts travels through bile duct along with chyme where these bind with their hydrophobic region to the big fat globules and then break up them into smaller fat droplets and then enter into the duodenum.
