What is the source of energy in most ecosystems?
animals
plants
oxygen
sunlight

Which was most likely an effect on society that resulted from improvements in blood handling during world war i and world war ii?

Which short-term environmental changes would a very small asteroid or comet impact on earth most likely cause? check all that apply. flooding extinction craters on surface changes in weather patterns death of organisms and populations

Which organism can most likely be classifild as domain bateria