Please answer this fast

Which potential solution below best addresses the issue of loss of biodiversity in a north american ecosystem?

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

An example of internal feedback working to maintain homeostasis is your a. decreased respiration rate when you are studying b. decreased heart rate when you are sad c. increased respiration rate when your muscles need more oxygen d. increased heart rate when your lungs need more oxygen