Answer:
Replication is the process by which a double-stranded DNA molecule is copied to produce two identical DNA molecules. DNA replication is one of the most basic processes that occurs within a cell. Each time a cell divides, the two resulting daughter cells must contain exactly the same genetic information, or DNA, as the parent cell. To accomplish this, each strand of existing DNA acts as a template for replication.
Replication occurs in three major steps: the opening of the double helix and separation of the DNA strands, the priming of the template strand, and the assembly of the new DNA segment. During separation, the two strands of the DNA double helix uncoil at a specific location called the origin. Several enzymes and proteins then work together to prepare, or prime, the strands for duplication. Finally, a special enzyme called DNA polymerase organizes the assembly of the new DNA strands. The following description of this three-stage process applies generally to all cells, but specific variations within the process may occur depending on organism and cell type.
Prokaryotes: the simplest and oldest form of life, single celled, start of live/where all life came from, they can live in any environment on Earth, bacteria are the only prokaryotes. They DO NOT have a nucleus. Tails help them move along with little hairs around the cell. No organelles, they have circular chromosomes, they're unicellular or colonial, they have a cell wall and cell membrane.
Eukaryotes: Have a nucleus as well as organelles, linear chromosomes, have a cell wall (plants&fungus), have a cell membrane.
Hope I was able to help! :)
C) Tundra without a doubt, the tundra biome is very cold year-round and, in some cases especially in Antarctica, can has no visual of the sun for months at a time.
