More than 50% of the entire human genome codes for functional proteins.
Answer the following statement true (T) or false (F)
False
Less than 2% of the entire human genome codes for functional proteins.
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Which of the following statements comparing endotherms and ectotherms is correct?
A) Mitochondrial density and enzyme activity are 3-4 times higher in the cells of ectotherms than in the cells of endotherms of similar size. B) Endotherms can use more of their energy intake for reproduction than ectotherms can. C) Endotherms and ectotherms have about the same mass-specific metabolic rate. D) Both endotherms and ectotherms exchange heat with the environment through convection, conduction, radiation, and evaporation.
Imagine that you are talking with one of your friends. He states that evolution has actually violated the second law of thermodynamics because complex living organisms are more ordered than the nucleic acids, amino acids, and other molecules that compose them. Why doesn't evolution contradict the second law of thermodynamics?
a. Because evolution takes place over millions of years, the loss of entropy is negligible and thus the laws of thermodynamics are not violated. b. Evolution is a biological process, and biological processes do not have to conform to the laws of physics. c. Evolution doesn't affect entropy, as living organisms eventually die and become "disordered." d. Even though evolution may decrease the entropy of living organisms, it increases the entropy of the Earth (or the universe) as organisms release heat. e. Evolution actually does violate the second law of thermodynamics, and has been problematic for scientists.
Where are small subunits of ribosomes assembled?
a. Plasma membrane b. Nucleus c. Golgi body d. Lysosome e. Nucleolus
Identical twins have identical ____, but they do not always have identical ____
a. mitochondrial DNA; genotypes b. genotypes; mitochondrial DNA c. genotypes; phenotypes d. phenotypes; genotypes e. phenotypes; mitochondrial DNA