. PLEASE HELP ASAP What is the significance of vestigial structures?
a. They are leftover, underdeveloped structures from previous ancestors that show change.
b. They are beneficial adaptations that increase an organism's chances of survival.
c. They are new adaptations that have evolved to perform new tasks.
d. They suggest earth has changed as a result of weathering.

An uncovered pot of water lies out in the sun. which statements correctly describe what happens at the surface of the liquid water? 1. the vapor pressure remains constant regardless of the water temperature. 2. the vapor pressure is produced by water molecules that have evaporated. 3. the vapor pressure increases as the sun heats the water in the pot. 4. evaporation stops once the vapor pressure reaches a certain point. 5. evaporation and condensation both occur on the liquid’s surface.