What are the answer choices?
Calcium which is a major mineral in the body
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.
Answer: they both have a:
Nucleus. The nucleus can be thought of as the cell's headquarters.
Plasma membrane. To ensure each cell remains separate from its neighbor, it is enveloped in a special membrane known as the plasma membrane.
Cytoplasm.
Lysosomes and peroxisomes.
Cytoskeleton.
Endoplasmic reticulum.
Golgi apparatus.
Mitochondria.
