The disadvantages of the pyramid of productivity as a representation: The rate of biomass production of an organism is required, which involves measuring growth and reproduction through time. There is still the difficulty of assigning the organisms to a specific trophic level.
I believe the correct answer is upwelling. Lets say we have producers such as plankton. well upwelling currents bring dead matter from the ocean floor up to the surface, creating plankton.
Fossilized non-seed vascular plants from the Devonian period have been identified.
<span>The Devonian is an early period and conformity of the Paleozoic Epoch forming from the edge of the Silurian Era.</span>
The answer is A. G1 phase -DNA replication
Answer:B
Explanation:i belive its b