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Wild turkeys are dramatically sexually dimorphic; domesticated turkeys are less so. Suppose that wild female turkeys chose mates on the basis of expensive traits that indicate disease resistance and that artificial selection for rapid weight gain in domestic turkeys destroyed female choice.
Briefly describe the mechanism of selection in wild turkey populations. What would you predict about the evolution of disease resistance in domestic turkeys? If we observe that domestic turkeys are less resistant, does that necessarily mean that wild females had be choosing more-resistance males, or are other hypotheses equally plausible?
Discuss how does column chromatography separate molecules such as DNA and RNA? Explain whyis it difficult to separate large amounts of RNA and DNA using gel electrophoresis?
Name the two organelles (one in animal cells and one in plant cells) that have their own DNA that are NOT located in the nucleus.
Assume that you have been able to clone the structural gene for an enzyme in a catecholamine biosynthetic pathway from the adrenal gland of rats.
Most biologists believe that immune system's defense against infections largely rests on its ability to distinguish self molecules from nonself molecules.
Echinaccea is a plant that grows flowwers with pink petals, which surround a large orange center. Extracts from the plant are said to support or enhance the human immune system.
Explain how lipids can be metabolized by the same pathways that oxidize glucose. In your own words, please no copy and pastes from wikipideia.
Female mammals, including women, sometimes develop benign tumors called "ovarian teratomas" or "dermoid cysts" in their ovaries. Such a tumor begins when a primary oocyte escapes from its prophase I arrest and finished meiosis I within the ovary.
The wider orrcurence of glycolysis in nearly all organisms, both aerboic and anaerobic, indicates that it is one of the most ancient metabolic pathways.
If the genes were expressed in the cell, predict that signal would win out for the following combinations. Give details your reasoning.
Explain the general function of Respiratory system and describe how the Respiratory system contributes to the physiological homeostasis of human organism?
How could these three cell types be clearly and simply distinguished from each other in an experimental laboratory and how and where do these different cell types differentiate to their mature functional characteristics?
What is the pK of the weak acid HA if a solution containing 0.1M HA and 0.2M A has a pH of 6.5?
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