Xx - female. Xy - male. egg already has an X chromosome so it depends on the other. If second one is X than it's a girl. If Y - a boy
I think it might be like 122°F or 50°C but not completely sure
The endomembrane system has the different membranes that are suspended in the cytoplasm within a eukaryotic cell. The membranes divide the cell into functional and structural compartments, or organelles.