According to the law of conservation of matter, matter is never created or destroyed. It only changes form as is evident in the water cycle. But what about the other geochemical cycles? Nutrients circulate throughout the environment in complex cycles called biogeochemical cycles, or nutrient cycles. Car bon, oxygen, phosphorus, and nitrogen are nutrients that cycle through all of Earth’s spheres and organisms.
Carbon becomes part of the carbon cycle in several ways, both by physical and chemical means. Carbon enters a food web via __________ through the process of ______________.
Responses
A producers; photosynthesisproducers; photosynthesis
B land plants; metabolismland plants; metabolism
C producers; respirationproducers; respiration
D trees; transpirationtrees; transpiration