In the following food chain, which organism receives the least amount of energy? plankton ⇒ shrimp ⇒ fish ⇒ seal plankton shrimp fish seal

Awater molecule is polar because there is an uneven distribution of these between the oxygen and hydrogen atoms.

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.

Common symptoms of an iron-defiency anemia include muscle weakness shortness of breath and lightheadedness why does iron deficiency causes these symptoms