Answer:
I, II, III
Explanation:
A threshold stimulus is a stimulus that is capable to produce a response in excitable tissues such as neurons and muscle fibers. At threshold potential, the outward movement of K+ and inward movement of Na+ become equal to each other. When the potential exceeds the threshold potential, more and more Na+ enter the cell to depolarize it and to allow the opening of Na+ channels. Therefore, to fire an action potential, the threshold must be exceeded.
Conduction of action potential is all or none phenomenon which means that either it occurs or it does not occur. As an impulse is passed by each successive part of an exon, it enters the refractory period during which there is no conduction of nerve impulse. It ensures the one-way conduction of impulse from the cell body to the axon terminal only.
Viruses are made up of DNA
B) sunlight
Sunlight supports life by providing food and warmth which is needed for the population of practically anything on earth to survive
Could you attach the statements so i can answer :)
Generally people would say that the result are published in journals, and it is true that Journals are often the first opportunity for many people to read about those results.
However, it takes a long time to publish in a journal, and people often present their results to a smaller audience at a conference before the journal is ready.
