Given its role in either amplifying or decreasing the intensity of different types of signal inputs, is the neurotransmitter that may be involved in the process of reinforcement. serotonin dopamine acetylcholine norepinephrine

Which taxon group is more specific, in regards to organisms that are in that group? mammalia animalia

What organelle other than the nucleus houses dna in a eukaryotic cell?

Which statement describes characteristics of planarians? a they live in oceans, are parasites, and reproduce only sexually. b they live in fresh water, are parasites, and reproduce only asexually. c they live in oceans, are free living, and reproduce sexually and asexually. d they live in fresh water, are free living, and reproduce sexually and asexually.