Xavier is unresponsive to most social stimuli. he rarely smiles, talks, or makes eye contact with others. he seems indifferent to everyone, including his parents. he engages in solitary, ritualistic behaviors such as constantly flapping his hands. he sometimes goes into sudden tantrums or panics. he also insists on the same familiar food each day. xavier's disorder is most likely:

Sydney drew a flow chart to illustrate the nitrogen cycle.which labels best complete the flow chart? x: producers undergo photosynthesis.y: nitrogen compounds are released into the air.x: nitrogen compounds are released into the air.y: producers undergo photosynthesis.x: free nitrogen is in the atmosphere.y: producers absorb nitrogen compounds through their roots.x: producers absorb nitrogen compounds through their roots.y: free nitrogen is in the atmosphere.

Would really appreciate it, i have an idea but not completely sure

Sampling lake water for microscopic organisms is not as easy as it sounds when you want to both count and identify species. in a given water sample, your bacteria of choice can be rare or difficult to culture, particularly given the mixture of bacteria in a biofilm. which of the following culture media would be best for growing fecal coliforms when they are relatively less abundant than other bacteria in the lake? anaerobic culture medium enrichment culture medium complex culture medium basic culture medium