True or false: The divisions among Eras reflect major changes in the fossil record, including the extinction and appearance of new life forms. *

Which flexible structure that supports the nerve cord and led to the backbone

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..

Apaleontologist finds a plant fossil that shows that the plant had seeds. what can the paleontologist conclude?