Correct the statement and if necessary rewrite a)cell wall is essential in plant cells
b)nucleus control cell activity
c)unicellular organisms perform all life processes like respiration excretion growth and reproduction .
d)to observe nucleus and organelles clearly, staining is not necessary ​

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..

What best describes the structure of the declaration of independence?

Which structure in the cardiovascular system connect arteries to veins?