What is difference between stoma and lenticel

Aboy with an extra x chromosome probably has which of the following syndromes?

What causes darkening of the skin as melanin production increases

The fruit of a certain plant is sweet and fleshy. the seeds of this plant have a seed coat that is fairly tough. the seeds germinate better if they are exposed to acid, or scarification. what is the most likely type of dispersal for this seed? water animal wind