Yellowfin tuna, or thunnus albacores, are large sport fish that are found in tropical and subtropical waters around the world. they typically school under objects such as boats or patches of driftwood for protection from predators. schooling under these structures also provides yellowfin tuna with easy access to a food source such as smaller herbivorous fish that may be foraging for food around the structures. which trophic level does yellowfin tuna fill in a food chain? we

A trophic level of an organism shows its position in a food chain:

1. Producers, such as plants and algae, produce their own food and thus are the base of every food chain.

2. Primary consumers eat producers. They are herbivores that eat plants.

3. Secondary consumers eat primary consumers. They eat herbivores, so they are carnivores or omnivores.. 

after a the power stroke, adp is released, but the cross-bridge formed is still in place. atp then binds to myosin, moving the myosin to its high-energy state, releasing the myosin head from the actin active site.

multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).   so the answer is a.