Answer: :)
Explanation:
Complex organisms have specialized tissues, such as nerves, organs or flowers. In contrast, simple organisms, such as amoeba or yeast, exist as a single cell. Larger organisms tend to have more specialized cells that smaller ones. Some single cell organisms bind together to form a colony.
In Biology you study living organisms, so that would include plants and animals.
The color of beef is determined by myoglobin because these cells are actually responsible for transporting oxygen-rich molecules to the the tissues of the animal. This characteristic gives it the color that it has and is very abundant in large organisms like cattles.
Answer:
Explanation:Invasive species are a problem because they disrupt other species and they can overpopulate and wipe out other species.