Answer:
common ancestor. ... Mammals share the homologous structure of the vertebrae in common.
Explanation:
I believe that phytoplankton is necessary to begin a food web
Plant cells have a cell wall, but animals cells do not. Cell walls provide support and give shape to plants. Plant cells have chloroplasts, but animal cells do not.
Hope this helps :)
Answer:
Without naturally occurring greenhouse gases, Earth's average temperaturewould be near 0°F (or-18°C) instead of the much warmer 59°F (15°C). The concentration of greenhouse gases, especially carbon dioxide and methane, has fluctuated naturallyover geological time scales.
Answer:
A. decomposers transfer nutrients back to the soil
