A cell membrane is said to be a bilayer. What forms the two layers? A) Phospholipid molecules that self-arrange tail-to-tail

B) Proteins and carbohydrates with electrons

C) Aquaporins and proteins with opposite charges

D) Phospholipid molecules that self-arrange head-to-head

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..

Describe the response the kidneys have to dehydration and excessive water intake. what happens to the concentration of urine in each case ?

Me with these questions image attached