Elements pass from one organism to another and among parts of the biosphere through closed loops called biogeochemical cycles, which are powered by the flow of energy.
Answer:
they attach to the bones.
What kind of force? There are lots of forces acting on the car at this point.
Answer:
c: cohesion
Explanation:
This cohesive relationship between the systems is known as pulmonary circulation. It helps the circulatory system in pumping the blood from the feet to the heart.
Answer:
Biologists measure the number of trophic levels in an ecosystem so as to check its stability and health.
Explanation:
Trophic levels are the feeding position in a food chain such as primary producers, consumers, etc. They are positions that an organisms occupies in a food chain (series of steps in which organisms transfer energy by eating or being eaten);- what it eats and what eats it.
Theoretically there is no any limit to the number of trophic levels in a food chain or number of organisms that live on each level.
