Por qué un organismo con pulmones no puede respirar en el agua. 3. Indica las características más sobresalientes en cada caso:
• La respiración traqueal
• La respiración cutánea
• Los pulmones de los mamíferos

Consider the last statement in the prompt: "people take such environmental factors into account in their choices when deciding where to live." do all people have a choice as to where they live? what factor plays a key role in this decision and may therefore play a large role in determining quality of life?

Glycogen is an energy-storage molecule in humans. a hormone that is called insulin controls the storage of glycogen in the liver. insulin is made up of amino acids.

How is the carbon cycle related to global warming ?