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1. A graduate student injects 8 rats with a chemical compound commonly found in the environment and finds that all of the rats die within a few days. Eager to publish her results, the student comes to you , her adviser. What would you suggest the student do before publishing his results? Help her design a controlled experiment. State a good hypothesis, describe the experiment , identify the control group, independent, dependent and controlled variables.
2. Lithops are succulent plants that resemble stones. Describe four characteristics of life that distinguish these plants from dead stones they mimic.
3. In early spring, Dr. Tom Wilson notices that there is an equal distribution of long and short stemmed buttercups in the vacant lot across the street from his house as well as in his own backyard. In late summer he notes that there are mostly long stemmed buttercups in the lot, but mostly short stemmed buttercups in his yard. These observations are examples of what biological principle? Develop a hypothesis to explain Dr. Wilson observation.
Energy pyramid, autotroph, heterotroph, food web, Biomass
Would you expect Dissolved Oxygen in water taken from the stream entering a lake to be higher or lower than Dissolved Oxygen taken from the lake itself? Give details.
An autoimmune disease alters microglial cells in brain so that they see all of your oligodendrocytes as foreign, and therefore destroy them like they would any other material.
Both members of a couple are carriers for a recessive disease allele. If the couple has four children, which of the following must be true?
A protein has a molecular mass of 200 kDa as determined by gel filtration (=native molecular weight). When separated by SDS-PAGE (without a reducing agent present) only one polypeptide appeared with a mass corresponding to 100 kDa.
If an endangered species such as the Santa Ana River Woolly Star were to become extinct, what effects might this have on other species?
How cytokinesis takes place in animal and plant cells, What occurs in every phase if Mitosis, What a homologous pair of chromosomes is and what it means
They tend to be less well-accepted in their peer group, because they haven't had opportunities to learn effective conflict resolution strategies.
Explain why is 5% (w/v) Sucrose solution hypotonic to the water plant cell, however a 5% (w/v) NaCI solution is hypertonic?
A short-whiskered mutant was discovered in rabbits. When this mutant is crossed to a long-whiskered rabbit, 4 offspring had short whiskers and 3 had long ones. Mating of short-whiskered offspring mate in a number of subsequent generations, yieldin..
How many ATP equivalents (assuming GTP=ATP) are produced by the complete oxidation of acetoacetate to CO2 and water?
Summarize the environmental effects of increased atmospheric and oceanic carbon dioxide concentrations.
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