That students who study make better grades than those who do not.
Oceanography, geology, meteorology, astronomy, and environmental science
A, plant growth would decrease. Decomposers break down organic materials into nutrients and return these nutrients to the soil. The nutrients are vital to plant growth. If decomposers went extinct, then eventually plants would use up all the existing nutrients and start to die.
If we had no cilia in our trachea, our lungs would be filled with dust and microorganisms that we breathe in.
Answer:
The answer is the integumentary system. Hope that helps! :)