Which domains replaced kingdom Monera?
A. Protista and Archaea
B. Bacteria and Eukarya
C. Archaea and Eukarya
D. Archaea and Bacteria
Answer: D
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Scientists began to question the perfection of
the Chain of Being because of a. the discovery of new organisms in new parts of the world. b. the presence of body parts with no apparent function in some organisms. c. the existence of fossil forms. d. similarities in the structures found in different forms of life. e. all of these.
Arrange the events of a second messenger system in the correct order
1) Protein kinase is activated. 2) G protein is activated. 3) The neurotransmitter binds to its receptor. 4) The protein closes the potassium channel. 5) Cyclic AMP is produced. 6) Phosphorylation takes place. a. 1 ? 2 ? 5 ? 6 ? 4 ? 3 b. 3 ? 5 ? 6 ? 1 ? 2 ? 4 c. 5 ? 2 ? 6 ? 1 ? 3 ? 4 d. 3 ? 2 ? 5 ? 1 ? 6 ? 4 e. 5 ? 2 ? 6 ? 1 ? 4 ? 3
What type of reaction is the reverse of a condensation reaction?
A.) oxidation B.) decondensation C.) hydrolysis D.) reduction
The northern copperhead is Agkistrodon contortrix contortrix, the southern copperhead is Agkistrodon contortrix mokasen, and the cottonmouth is Agkistrodon piscivorous. Therefore,
A. all are subspecies of Agkistrodon. B. they are three distinct species. C. The copperheads are subspecies and the cottonmouth is a separate species. D. they are all the same species.