Select the most correct statement. the endocrine system is not a true structural organ system. organ systems operate independently of each other to maintain life. organ systems can be composed of cells or tissues, but not both. the immune system is closely associated with the lymphatic system.

The finches on the galapagos island were similar in form except for variations of their beaks. darwin observed that these variations were useful for: attracting a mate defending territory building nests gathering food

Which of the follow describes a disadvantage secondary sources have compared to primary sources?

Which statement about relative potential energy of electrons is correct? a. an electron in the 2 p orbital of the second electron shell has more potential energy than an electron in the 2 s orbital of the second electron shell. b. an electron in the 2 p orbital of the second electron shell has more potential energy than an electron in the 3 p orbital of the third electron shell. c. an electron in the 3 p orbital of the third electron shell has more potential energy than an electron in the 2 p orbital of the second electron shell.