Flowers that are particularly attractive to bees have
petals that
a. are yellow.
b. are blue.
c. are purple.
d. reflect ultraviolet light.
e. fit all of these descriptions.
Answer: e
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Unlike other prokaryotes, archaeons (except Sulfolobus) have two origins of replication.
Answer the following statement true (T) or false (F)
Arrange the steps of antibody-mediated immunity in the proper order
1. Plasma cells secrete antibodies. 2. Helper T cells interact with B cells displaying the same antigen-MHC complex. 3. Contact with antigen. 4. Clones of B cells produced. 5. Fragmentation of antigen.
a. 3, 2, 5, 1, 4 b. 3, 5, 2, 4, 1 c. 1, 3, 5, 2, 4 d. 4, 3, 2, 1, 5 e. 5, 3, 4, 2, 1
What is removed from dNTPs to provide the energy required for DNA polymerase to catalyze DNA strand elongation?
What will be an ideal response?
A potato stores a reserve of energy in its underground tuber in the form of
A. glycogen. B. starch. C. vitamins. D. protein. E. fat.