A sudden increase in the number of producers in an ecosystem would first affect the population of:
carnivores
saprophytes
decomposers
herbivores

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 kinds of molecules can pass through the cell membrane without any problem?

The part of the eye that closes and opens to let light in is .