At what level do biologist study life?

Biologists study life from the smallest levels of elements and biomolecules to the largest level of the biosphere. Cellular hierarchy refers to the levels in which life can be studied. Starting at the smallest level we can begin with elements of life, biomolecules, cell organelles, cells, tissues, organs, organ systems, organism, populations, community, ecosystem, biomes and finally biosphere.

Used to water and cool climates, probably not thick coated or fluffy. they most likely have thin coats and have to survive to find food. sorry if this wasn't the answer you were looking for..: )

Compound light microscope