100 points A football player gets tackled during the game, which of the following body systems is responsible for protecting their organs?

circulatory system

reproductive system

skeletal system

nervous system

Give examples of animals that live in sea and are considered mammals. ♡

There are six elements that make up most of the human body. which of the following is not one of these six elements?

Consider darwin's first writings on the theory of natural selection. an important point of darwin's essay on the principle of population, written in 1798, was a peer's observation that in nature plants and animals produce far more offspring than can survive, this observation can be attributed to a) charles lyell. b) thomas malthus. c) jean-baptiste lamarck. d) johann friedrich meckel.