Im pretty sure its c. I did that a couple of years ago...I think
The sun gives the animals energy to do whatever they want
Answer AND Explanation:
Very often, one type of organism or species in an ecosystem happens to be the same food source for other types of consumers. The different food chains that exist in an ecosystem therefore form a complex network called food web. Food webs are more complex than food chains and therefore there can be more than one primary producer thus increasing the flow of energy an ecosystem.
Answer:
D. Because the universe is expanding, scientists conclude that in the distant past, all matter was compressed into a single point.
There are a lot of effects that could happen to the function of the neurons when the neuro toxin have conducted the change. Would be unable to generate action potentials are the axons. Also the axon potentials would have a shortage in repolarization phase. So it can actually be shorter than usual.