Which portion of the photosynthetic apparatus absorbs light?
A. photosystem II
B. NADP reductase
C. both photosystem I and photosystem II
D. photosystem I
E. both photosystem I and NADP reductase
C. both photosystem I and photosystem II
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Why is the distance of the Earth from the sun so crucial for life as we know it?
a. The distance provides the optimal temperature for water to occur in a liquid form. b. The distance allows the Earth's orbit to have a year of a reasonable length. c. The distance allows for multiple seasons in temperate climates, which was crucial for development of different chemicals used to build the first protocells. d. The distance provides ample opportunity for water to freeze into ice. e. The distance ensures that ample water is available for all of the organisms on Earth.
Which of the following would you expect to find predominating in the plasma membrane of a unicellular eukaryotic organism thriving in glacier ice?
A) 20 carbon long saturated fatty acids. B) 18 carbon long saturated fatty acids. C) 20 carbon long fatty acids with 1 double bond. D) 18 carbon long fatty acids with 1 double bond. E) 16 carbon long fatty acids with 3 double bonds
In June 2001 an announcement was made that a draft sequence of the ____________________ nucleotides in the
human genome had been finished. a. 350 million b. 990 million c. 1.1 billion d. 3.2 billion e. 56 billion
The diagnostic procedure that images the structures of the blood vessels and the flow of blood through these vessels is known as _________ .
Fill in the blank(s) with the appropriate word(s).