Answer:
photosynthesis takes place in chloroplasts.
Fish and bird are biotic and the bird would hurt the fish depending on the species of birds since some birds are carnivores.
Answer: Cytotoxic T cells
Explanation:
A Cytotoxic T cell is a cell whose activation is mainly aimed at destroying cells that are infected by virus. It is a type of white blood cells that destroys cancerous cells or cells that are impaired especially by viruses. A Cytotoxic cell is also known as T-killer cells, Cytolytic T cells, T lymphocyte.
Cytotoxic T cells destroy target cells by prearranged apoptoses.
Unnatural Occurrences. Hope this helped.