Water is an essential to constituent of the protoplasm of living cells because it is directly involved in countless biochemical reactions like photosynthesis and respiration. Without it cells couldn’t move waste and by products, take in nutrients, perform intracellular transportation, functioning and signaling.
Answer: They aren't classified as birds because monotremes are mammals, unlike birds. They are referred to as mammals because they have mammary glands responsible for manufacturing and producing milk. Birds cannot do this.
I'm not sure if there were choices here but I would fill in something like "logically" or "scientifically".
Hope that helps.
Answer:
it's called taxonomy or binomial nomenclature
the first name is generic (from genus) and begins with a capital letter
the second name is specific (from species) and begins with a small letter
a function of the pericardium is to: provide a barrier against extracardial infections. improve blood flow through the heart.
