What is formed when carbon is absorbed by the ocean (hydrosphere)?

What is thought to have caused the mass extinction at the end of the cretaceous period?

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..

Most animal cells membranes have proteins that pump ions out of the cell and potassium ions into the cell