Answer:
An invasive species enters the environment.
Explanation:
All other answers already naturally happen in an environment so they are stable. But if an invasive species enters, the ecosystem will be less stable because invasive species dominate ecosystems which isn't natural to the animals that live there. So for example, if someone introduced an invasive species to the ecosystem, it can cause many changes like if it was a predator, there'll be less primary consumers (the animals that eat plants) because the invasive species isn't natural to them.
Answer:
i believe it is energy path
Explanation:
D is the answer
Because it’s the answer
Additional copies of a gene ON A CHROMOSOME causes cellular problems. The number of chromosomes is fixed for a particular organism. For example, humans have 46 chromosomes or 23 pairs of chromosomes. Each chromosome has segment of the DNA known as genes and is the characteristic of that chromosome. Any alteration such as addition or removal of genes causes cellular problems that lead to changes in phenotypic expressions.