This type of lipid is found in pigments such as chlorophyll, in the visual pigment retinal, and in rubber:
A. steroid.
B. wax.
C. prostaglandin.
D. terpene.
E. phospholipid.
D
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What are the sources of sulfur in the atmosphere?
A) Mostly (over 90%) volcanoes and photosynthetic bacteria B) Mostly transportation modes, such as autos, trucks, and planes C) Volcanoes and hot springs, but mostly (about 75%) human activities such as burning coal D) Decomposition and small amounts from pollution E) Natural and human sources, in equal amounts
What is the ultimate fate of the carbon atoms in a glucose molecule that goes through aerobic respiration?
A. It is turned into starch. B. It is converted to pyruvate. C. It is converted to glycogen. D. It is released as carbon dioxide. E. It is recycled in the citric acid cycle.
Water is able to cross plant plasma membranes by a combination of
A. diffusion and phloem. B. root pressure and turgidity. C. transpiration and Casparian strips. D. osmosis and aquaporins. E. evaporation and diffusion.
The type of evolution that involves speciation is called
A. macroevolution B. microevolution C. coevolution D. natural selection E. phyletic gradualism