Biology Essays Unit 5

Biology Essays Unit 5-30
Select two of the following three pairs and discuss the evolutionary relationships between the two members of each pair you have chosen.In your discussion include structural adaptations and the functional significance.Scientists recently have proposed a reorganization of the phylogenetic system of classification to include the domain, a new taxonomic category higher (more inclusive) than the Kingdom category, as shown in the following diagram.

Select two of the following three pairs and discuss the evolutionary relationships between the two members of each pair you have chosen.In your discussion include structural adaptations and the functional significance.Scientists recently have proposed a reorganization of the phylogenetic system of classification to include the domain, a new taxonomic category higher (more inclusive) than the Kingdom category, as shown in the following diagram.

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Describe the fluid-mosaic model of a plasma membrane. Include a description of mitosis and cytokinesis, and of the other phases of the cell cycle. After realizing the error, the assistant randomly labeled the flasks containing these four unknown solutions as flask A, flask B, flask C, and flask D.

Discuss the role of the membrane in the movement of materials through it by each of the following processes: 6. Indicate the ways in which a nonphotosynthetic prokaryotic cell would differ in structure from this generalized eukaryotic plant cell. Design an experiment, based on the principles of diffusion and osmosis, that the assistant could use to determine which of the flasks contains each of the four unknown solutions.

Include in your answer (a) a description of how you would set up and perform the experiment: (b) the results you would expect from your experiments: and (c) an explanation of those results based on the principles involved.

(Be sure to clearly state the principles addressed in your discussion.) 9. Choose THREE of the following four types of cellular transport.

A portion of specific DNA molecule consists of the following sequence of nucleotide triplets.

TAC GAA CTT GGG TCC This DNA sequence codes for the following short polypeptide.

Include in your discussion the major reactions, the end products, and energy transfers. The rate of photosynthesis may vary with changes that occur in environmental temperature, wavelength of light, and light intensity.

Using a photosynthetic organism of your choice, choose only ONE of the three variables (temperature, wavelength of light, or light intensity) and for this variable 12.

methionine – leucine – glutamic acid – proline – arginine Describe the steps in the synthesis of this polypeptide.

What would be the effect of a deletion or an addition in one of the DNA nucleotides?

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