Santiago ramon y cajal demonstrated that a. at rest, the neuron has a negative charge inside its membrane b. neurons are separate from one another c. action potentials follow the all-or-none law d. neurons communicate at specialized junctions called synapses

How can scientists test their ideas about the origin of the universe if they can't physically interact with or study?

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

Of your good in bio kusing a series of preliminary observations; pstate a problem developed from these observations, formulate a hypothesis, design an experiment to test the hypothesis