Do u know who drew this and what they used (pastel or chalk)

Apart of an ecosystem that can restrict the growth of a population is referred to as

The large increase in atmospheric carbon dioxide in the last 50 years most likely comes from a. an increase in cellular respiration b. increased decomposition by bacteria c. an increase in the burning of fossil fuels d. an increase in photosynthesis

What problem would a person most likely have if her kidney did not work correctly?