External fertilization is the correct answer.
all of the above can be considered ecosystems
Answer:
10 % of the energy (i.e., 50 calories) is converted to biomass
. This efficiency of energy transformation is high
The answer is B. Platypus, as they are mammals that lay eggs.
Answer:
No because Trilobites are older because they are in the deepest rock layer and the dinos aren't plus Two species of trilobites found in the Southwestern United States. Trilobites went extinct 250 million years ago, long before the appearance of the first dinosaurs.
Explanation: because i love talking about fossils
