Which of the following is a difference between plant cells and animal cells? A.
Plant cells have a rigid structure, while animal cells have a more flexible structure.
B.
Animal cells carry out photosynthesis; plant cells do not.
C.
In plant cells, DNA is stored in the mitochondria; in animal cells, the DNA is stored in the nucleus.
D.
Animal cells undergo cell division; plant cells do not divide.

8

explanation:

each principal energy level above the first contains one s orbital and three p orbitals. a set of three p orbitals, called the p sublevel, can hold a maximum of six electrons. therefore, the second level can contain a maximum of eight electrons - that is, two in the s orbital and 6 in the three p orbitals.

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"hydrogen bonding is the attraction of h atoms in the water molecule (slight + charge) to o atoms in a neighboring water molecule (slight - charge); it is a weak interatomic force. but it is still strong enough to the water molecules "stick" together."