What is the advantage in animals coupling nitrogenous waste excretion to osmolarity regulation?

Match the correct terms to their descriptions a system in which only energy but not matter is exchanged frozen water in snow part of geosphere that includes only soil a thin layer between the troposphere and the stratosphere cryosphere tropopause closed system pedosphere

Which of the following molecules can be broken down into simple sugars? a. nucleic acid b. protein c. lipid d. carbohydrate

Modern sea star larvae resemble some primitive vertebrate larvae. this similarity may suggest that primitive vertebrates