How could you confirm in the photosynthesis experiment that oxygen and glucose were not the cause behind the color change observed in the experiment, especially Tube P? can someone help me

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

Plz genetic engineering can be applied to many fields including medicine and agriculture. which of the following is a medical application of genetic engineering? a. giving crop plants recombinant dna so that they would be resistant to herbicides. b. examining a persons pedigree to determine whether they can carry a gene for a genetic disease. c. analyzing a persons dna to see how closely they are related to another person. d. certain genes into bacteria so that they will produce a needed medicine.

Why are scientists concerned about the depletion of the ozone levels in the stratosphere?