Because there is less energy at higher trophic levels
Explanation:
In a food chain that shows the feeding levels of organisms in an ecosystem, energy decreases as you move from the lowest trophic level to the highest trophic level.
The lowest trophic level consists of producers which have the highest energy as they trap energy directly from the sunlight.
The energy is lost from one trophic level to the next up to the highest trophic level which has the lowest energy.
Therefore, organisms at the highest trophic level are fewer in number but large in size.
If you increase the number of trials in an experiment it will make the test more valid and legitimate.As you take the same test/experiment once or twice you could see if your results are similar to each other.
Early hypotheses were not based on observations. Early hypotheses were not tested by experimentation. Early hypotheses were formed from scientific questions. Early hypotheses were influenced by creative thinking
