The ____________ is a disk-shaped cloud of icy bodies believed to extend from about 40 AU (the orbit of Pluto) out to 100 AU. It is believed that most short-period comets originate from this region
a. Oort cloud
b. Widmanstätten cloud
c. Apollo-Amor
d. Kirkwood region
e. Kuiper belt
e
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Which of the following is a type of cloning?
A. Therapeutic cloning of stem cells to general specialized cell B. Reproductive cloning, where organisms are produced through nuclear transplantation C. Artificial cloning of plants to generate specific types of fruits or vegetables D. All of the above are types of cloning
The term used to describe all of the chemical reactions within a cell is ________.
A. metabolism B. phosphorylation C. redox reactions D. catabolism E. cellular respiration
What is the approximate pH of ammonia?
a. 2 b. 4 c. 7 d. 8 e. 11
Please choose the answer that best fills in the blanks of this sentence in the correct order. A ________ infectious disease, such as a urinary tract infection, is not transmitted from person to person, whereas an infectious disease which is transmitted from one person to another, such as influenza, is referred to as a ________ infectious disease.
A) Communicable; noncommunicable B) Noncommunicable; communicable C) Communicable; contagious