In the keystone predator simulation, the invasive european green crab replaced starfish as a keystone predator
a. true
b. false

True

Explanation:

A keystone predator is a one which plays a functional role in the community of living beings by feeding the considerably increasing prey population. Hence, maintains a balance in nature.

The european green crab is a invasive species, which acts as a keystone predator it fight with the native crab species for resources like food. Reduces the abundance of marine species specially the mollusks, crustaceans and the sellfish.

the oceanic zone is typically defined as the area of the ocean lying beyond the continental shelf, but operationally is often referred to as beginning where the water depths drop to below 100 meters (328 feet), seaward from the coast to the open ocean.

explanation: