Producers generally require sunlight to make energy. Since there isn't sunlight at the bottom of the lake, they are unable to photosynthesize and produce energy they need to survive.
Answer:
There are two types of cell division: mitosis and meiosis. Meiosis is the type of cell division that creates egg and sperm cells. Mitosis is a fundamental process for life.
C. red blood cells, that is how we get oxygen into our bodies
They have different colored eyes because their parents do. Their parents could also have mixed genetics. This means that their parents could have dominant AND recessive traits (heterozygous), leading to one of the puppies to having full recessive traits.