Answer: I think it's the third one: Letter Q points to the guard cell. Letter T points to the stomata and the response is most likely due to the humid tropical nature of the enviorment.
Hollow bones are always a disadvantage because it means that they are less sturdy and easier for predators to break.
Look at the clutch size. There seems to be no patterns between the amount of clutch size and the survival rate because if you have a low survival rate, you can have either a high or low clutch size based on the info that is given<span />
What are your problems in bio?