I would go with the first option
During interphase, the genetic material is duplicated.
Answer:
secrete a cytokine that triggers apoptosis
Explanation:
Cytotoxic T cells secrete granzymes and perforins when targeting cells. Additionally they secrete cytokines such as IFN-, TNF-α and TNF-β that act to activate macrophages and help kill infected cells.
The only trait that I know that those birds and a squirrel have in common in that they both love birdseed.