What is the best role of langerhans cells

What evidence supports the law of conservation of energy? a) mechanical energy is converted to chemical energy during photosynthesis. b) oxygen is made from the breakdown of carbon dioxide during photosynthesis. c)energy is absorbed by chlorophyll and becomes chemical energy during photosynthesis. d)the sun gives off light energy that is absorbed by plants.

Which environmental change would most likely result in bullfrog offspring that are able to store more water than bullfrogs in previous generations?

In the figure below, which letter points to the structure through which water is lost during transpiration?