Question

the proportions of elements in the human body and the earths crust are quite different. which of the following statements is a conclusion that can be drawn from the data? choose all that apply—there may be more than one correct answer. choose one or more: a. the proportions of elements in humans reflect chemicals that readily dissolve in water, rather than the relative amounts found in the earths crust. b. elements like sodium (na) and calcium (ca) are not important in humans. c. organisms that live on land (like humans) must expend energy to concentrate some elements that are found in relatively low amounts in the earths crust. d. some elements, like silicon and aluminum, are intrinsically poisonous for living things. percent relative abundance h c o n ca and mg na and k p al si others earths crust human body

Explanation:

The graph shows different relative abundances of elements in the human body and Earth's crust. Sodium (Na) and calcium (Ca) are important for human - body functions like nerve impulse transmission and bone structure. Silicon and aluminum are abundant in the Earth's crust but not in high amounts in the human body, yet they are not intrinsically poisonous. Organisms may need to concentrate certain elements. The proportions of elements in humans don't necessarily reflect chemicals that dissolve in water.

Answer:

C. Organisms that live on land (like humans) must expend energy to concentrate some elements that are found in relatively low amounts in the Earth's crust.