Project #70333 - Biology

Answer these question in essay form, in 100-250 words. Provide a reference page and in text-citation.

 

1.         You scoop up a water sample from a local pond nearby, because you are curious about the possible microbes that might live there. After looking at several slides that held drops of the sample, you noticed two different kinds of cells: One kind was very small and had no separate internal structures; the other kind was much larger, and it contained several kinds of internal structures that were physically different from each other. Please name each cell and briefly describe their overall similarities and differences.

 

1.      PKU (phenylketonuria) is an enzyme deficiency disease that only develops in individuals who are homozygous recessive for that gene. An individual with PKU has parents that do not have this disease. What is the parents’ genotype for the gene responsible for PKU? What is the probability that they may have another child with PKU? How many future children of the affected individual will be carriers? Explain your answers.

 

3.         Humans share 99% of their genes with chimpanzees, 90% with mice, 50% with fruit flies, and 37% with celery. Please explain the evolutionary significance of these data.

 

4.         Describe the major land biome where you live. How have human activities changed the landscape and how has this affected native species? Include specific examples.

 

5. Lithops, also called Stoneplants, are a type of plant that resembles little stones. These

plants have the ability to blend in with there surrounding, which affords them protection

from predators. If you were in an area containing Lithops, describe four characteristics you could identify to distinguish these plants from the stones they mimic.

 

6.  DNA and RNA are similar yet distinct components of the cell. Describe three differences

between RNA and DNA with respect to their chemical composition and structure. Provide a

 

detailed description of each characteristic you chose in your response.

Subject Science
Due By (Pacific Time) 05/07/2015 02:48 pm
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