Animals in ecosystems in aquifers are adapted to which of the following

Which plains area lies in both the united states and canada? altiplano central canadian shield coastal plains great plains

Which statement best describes a keystone species? o a. it has littlelmenetic variation. it has an extremely high population. 0 b. 0 c. it remains unaffected by all environmental changes. od. it has a strong influence on the ecosystem. 0 e. it's the first species to populate a new ecosystem.

Place the steps tor the formation of the enzyme pepsinogen in correct order