Are there concerns about the use of GMOs? If so, what are these concerns?

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..

In each transformation of energy , some energy what?

Which of the following explains why a tree is often used as a model to represent the principle of common descent