Wavelengths

Which type of visible light is made available for plants grown under the clear, red, green, or blue plastic? Describe how the type of light availability influences the growth of a plant?

Biology Multiple Choice

1. DNA contains all of the following molecules EXCEPT: * uracil guanine adenine deoxyribose phospate 2. In aerobic respiration, the final electron acceptor in the electron transport chain is: * NAD+ O2 H2O NADP+ H2 3. A macromolecule which consists of a polymer of amino acids: * glycogen cellulose protein trigylceride nucleic acid 4. Lipid which consists of three fatty acids covalently bonded to glycerol: * glycogen cellulose protein trigylceride nucleic acid 5. The appendix of a human and the hipbone of a whale: * analagous structures homologous structures divergent evolution convergent evolution vestigial structures 6. Which of the following is a c... click for more

Effects of genetically modified organisms

I need help with the following, Biotechnology allows us to use living organisms or their processes for human needs or purposes. Research how biotechnology is used today. Describe one use of biotechnology do not use gene therapy, answering the following questions: What biotechnology application did you choose? Briefly describe this process or application. What benefits are derived from this? Are there any concerns or negative impacts associated with this use of biotechnology? Why or why not?

Biology

1. Explain why a well-adapted organism synthesizes only the proteins necessary at any particular moment. 2. When radioactive uracil is injected into the developing larvae of Drosophilia, only certain regions of the chromosomes in certain tissues contain radioactive uracil. Explain this observation.

Comparing DNA of rodent and human genes

1. In the “DNA clock”, some nucleotide changes cause amino acid substitutions in the encoded protein (nonsynonymous changes), and others do not (synonymous changes). In a comparison of rodent and human genes, rodents were found to accumulate synonymous changes 2.0 times faster than humans and nonsynonymous substitutions 1.3 times as fast. What factors could explain this difference? How do such data complicate the use of molecular clocks in absolute dating? 2. Imagine that Pangea were re-formed today. What might be some of the environmental effects, and how might these changes influence life on Earth?