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I need a four page essay on the following questions. No longer than a page for each topic (can be a little shorter than a page).
1. Examine disruptive, stabilizing and directional selection in natural selection. 2. Describe sexual selection and the concept of balanced polymorphism. 3. What are animal "body plans"? What kinds of animal body plans are there? What are some fundamental trends in animal evolution (three or four)? 4. What is speciation, and how does it happen? Part II. Shorter answers, a couple of lines for each item. The last one, about fishes, might be a little longer. 6. Why do scientists generally think that birds and reptiles are closely related evolutionarily? 7. What are amniote eggs, what advantages do they provide, and which species have amniote eggs? 8. Characterize Paleozoic, Mesozoic and Cenozoic eras in the earth's history. 9. What happened to dinosaurs? Did they all go extinct? 10. Describe annelids. 11. Describe a scientific scenario to describe how fishes may have been able to survive out of water.
By studying a large population of sego lilies on side of kinport peak, your colleague is interested in knowing the degree to which global climate change is affecting natural populations in Idaho.
Assume that a certain bacterial chromosome has one origin of replication. Under some conditions of rapid cell division, replication could start again from the orgin before the preceding replication cycle is complete.
What properties do homologous chromosomes share? a. size or length b. centromere position c. location of genes along its length d. all of the above.
A nutrient agar plate labeled 10^-5 mL had 154 colonies after incubation. What was the cell density in the original sample? What volume was used to inoculat this plate?
Can a cell perform any activity to increase the rate of reaction when enzyme has reached saturation point?
Assume you have been examining a new drug that binds to PPAR? and produces its beneficial effect (increased insulin sensitivity). When you give this chemical to mice, you see kidney damage.
Within a population of plants there are two alleles that code for flower color, red and white. Red is the dominant allele. If there are 300 red flowers and forty-five white flowers,
Your uncle promises to give you $550 per quarter for the next five years starting today. How much is his promise worth right now if the interest rate is 8 percent compounded quarterly.
In humans, let's say that having a free earlobe is dominant to having an attached earlobe, and that hairline is an X-linked trait whereby a normal hairline is dominant over a widow's peak hairline. Two parents with free earlobes and normal hairlin..
Pompe's disease is one of a class of lysosomal storage diseases in which one or more enzymes that are normally found in the lysosomes are defective or absent. In Pompe's disease, the enzyme that normally breaks down glycogen is absent.
A certain cell, which is surrounded of an extracellular, hypertonic environment, needs to move a molecule of sucrose out of the cell. What type of transport mechanism would it use? (Only choose one)
You cross the new mutant red fly with a normal fly. All the offspring are bright red. What does this tell you about the allele that causes the red coloring-is it dominant or recessive? Explain your reasoning.
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