Date: Class Name: BIO 341 FXAM 1 SPRING 201 structures, otherwise known as: apre

Question

Date: Class Name: BIO 341 FXAM 1 SPRING 201 structures, otherwise known as: apreadaptations. b allopolyploidy d. allometric growth. e. punctuated equilibrium. 27. The first cells were most likely heterotrophic anaerobes because: they were dependent upon cyanobacteria for oxygen. b. they manufactured organic molecules and needed oxygen. e. they mamufactured organic molecales and do not need oxygen. d. they utilized preformed organic molecules and needed oxygen. e. they uilized preformed organic molecules and did not need oxygen. 28. The genetic code demonstrates the univensality of living things because it is common to virtually all. a. animals b. bacteria. c. organisms. d. autotrophs e. eukaryotes 29. The overuse of antibiotics has led to a form of antibiotic resistant tuberculosis. This has occurred as a result of directional selection within the bacterial population. b. stabilizing selection within the bacterial population e, disruptive selection within the bacterial population. d. balanced polymorphism within the bacterial population. c. a heterozygote advantage within the bacterial population. 30. Darwin might have made greater advances in his theory of evolution by natural selection if he had: a read of the work of Charles Lycll b. taken into consideration the theories of Malthus ctaken into consideration the work of Gregor Mendel d. performed experiments in plant growth and development. e. visited other remote islands that contained a limited number of species 31. Which refers to the variations in rates of growth for different parts of the body? a. allopolyploidy b. preadaptations e. adaptive growth d. allopatric growth pattems e. allometric growth patterns Figure 21-1 Copyright Cengage Leaning. Powered by Cognera Page 6

Explanation / Answer

27. Answer e.

To create energy, these early bacteria probably consumed naturally occurring amino acids. Amino acids, sugars, and other organic compounds formed spontaneously in the atmosphere then dissolved in liquid water. Upon digesting these molecules, early bacteria produced methane and carbon dioxide as waste products. Fermenting bacteria would be an example from today of what these early creatures might have been like. And as the early atmosphere did not had oxygen the first cells did not require oxygen.

28. c. Organisims

29. a. directional selection within the bacterial population.

30. e. Allometric groeth patterns

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