An antigen is a foreign particle that can create an immune response within a person's body. They are also known by the term immunogenicity and can include pollen, viruses, bacteria, or chemicals. Antibodies are also known as immunoglobulins and these proteins are created by the body.
In photosynthesis, the mitochondria use both CO2 and H2O to produce glucose (a carbohydrate)
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Cell division is when the cell divides its chromisomes. Replication is when it replicates or makes another dna molocule like it.
D - the theory of natural selection states that the population will be narrowed as "less fit" organisms die and "more fit" organisms survive, passing on their beneficial genes to offspring. Therefore, more organisms are born than can survive.
