The formation of complex molecules that form life is made possible by what understanding regarding carbon?
A. Carbon forms a maximum of 8 covalent bonds.
B. Carbon can form a maximum of 6 covalent bonds.
C. Carbon forms up to 4 covalent bonds.
D. Carbon forms 2 covalent bonds.
E. Carbon forms an ions and cations.
C. Carbon forms up to 4 covalent bonds.
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Rank the elements carbon, phosphorus, calcium, and iodine in order of decreasing number of energy shells/levels
A. CPCaI B. ICaPC C. IPCCa
Did all of the fossil skulls appear to have teeth?
a. Yes b. No
Which of the following molecules spontaneously form membranes when mixed in water and most likely were one of the first organic compounds formed on Earth?
A) DNA B) Enzymes C) Phospholipids D) RNA
Which organ system removes nitrogen-containing waste products from blood?
A) lymphatic system B) integumentary system C) muscular system D) urinary system