It's not letting me put in the full thing but i have the rest of the answers!
The most important producer in both freshwater and marine ecosystems is phytoplankton.
Answer:
natural selection operates primarily on characteristics that are tied to reproductive fitness.
Explanation:
Based on the information provided within the question it can be said that this is due to the fact that natural selection operates primarily on characteristics that are tied to reproductive fitness. In other words natural selection keeps those traits that allow the species to live long enough in order to reproduce but does not weed out many harmful conditions and non-adaptive characteristics if the species reaches reproductive age.
The learned to compromise so A:)
If a dalton wabt thus eduction in the cadre fort you and apace