What characteristics of life does water not show? Does water express any of the 8 characteristics?

How many trophic levels are there in the following food chain? phytoplankton - shrimp - perch - pike - osprey

Competition occurs between species when

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.