Meselson and Stahl proved that
A. DNA contains nitrogen.
B. DNA replicates in a semi-conservative manner.
C. DNA is made from nucleotides.
D. DNA is the genetic material.
Answer: B
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Fats have _________ calories per gram, while carbohydrates and protiens both have __________ calories per gram.
A. 9.3;4.1 B. 4.1;9.3 C.10;5 D.17.6;6.5
What are the primary aspects of the process used by a tall tree to move water to the leaves at the top of the tree?
a. positive pressure from roots and cohesion b. cohesion and evaporation c. capillary action and pumps d. capillary action and positive pressure from roots
Large organ in the RUQ: secretes bile, stores sugar, produces blood proteins___________________
Fill in the blank(s) with the appropriate word(s).
Which layer of the skin is responsible for tanning?
A. epidermis B. keratin C. dermis D. subcutaneous layer E. hypodermis