Answer:
Explanation:
1.Variation is the result of speciation as species have evolved over time to adapt to enviromental changes
Producers are green plants or photosynthetic organisms that are the basis for the other living parts of any ecosystem. Producers need to have access to light to produce food. Few producers will be found deep below a lakes surface simply because the deeper you travel under water the less light penetrates those deeper layers.
Answer:
Humans, plants, and mushrooms all are made of cells.
Explanation:
Give nutrients and protein which helps you to get energy and strengh
Answer:
No of groups studied
As All other factors will effect the result ofvthe experiment.
But no matter how many groups you take to study they will show the same result
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