Difference and similarities between trophic levels and food chain

What feature of cell theory is best demonstrated in the image

Which medullary index indicates a human hair? a. 0.653 b. 0.733 c. 0.516 d. 0.256

According to piaget, children have acquired the cognitive skill of conservation when they're able to a. understand that six ounces of liquid in a jar and six ounces in an elongated tube are equal. b. understand the viewpoint of other people. c. relate objects around them to their own needs. d. realize that the term heavy describes an object one way and the term big describes it another way. it is not b nor c. did this 2 x wrong..