The answer is true, the phases are a trend
"A food chain is a linear sequence of organisms through which nutrients and energy pass as one organism eats another. ... Food webs consist of many interconnected food chains and are more realistic representation of consumption relationships in ecosystems."
The answer is B
A keystone predator would increase niche diversity and help reduce niche competition <span />
The dependant variable would be the salmon, because they depend on the water and pollution levels to give a result.
<span>palisade and spongy layers of the mesophyll are </span>the two layers of the plant containing chloroplasts
