Tolerance to ADD medications can occur. ADD medications can help increase the levels of neurotransmitter in the synapse.
Nonmedical use of ADD medications can cause symptoms known as "the crash" after the initial flood of neurotransmitter wears off.
ADD symptoms may be caused by altered levels of neurotransmitter.
Amphetamine use can cause increased alertness and mental focus.

The sketch shows a rynchosaur, an extinct animal that is known only from fossils. there has been much debate about the classification of these creatures. some scientists suggest that they belong with primitive amphibians, and some think they are related to snakes and lizards.the data equally support both cases. which statement best explains how to draw a cladogram that includes the rynchosaur? draw the cladogram for amphibians. draw the cladogram for reptiles. draw two cladograms, both showing the traits, and leave it as a hypothesis. draw two cladograms, both showing the traits, and have scientists vote

If the rna molecule in a human has the nucleotide sequence of guu, this would the amino acid valine would be needed to make the protein. how would this cha process was occurring in a mushroom?

Which is the most dominant generation in a liverwort