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Question: The habitat of one species of frog is the tall green grasses in a swamp. The vast majority of the frogs in this population are green. A few individual frogs carry a mutation that prevents the production of the green pigment; as a result these individual frogs are brown. The temperature in this area rises and less rain falls over a 10 year period, and as a result the swamp begins to dry up and the grasses turn brown. Using what you have learned about natural selection, explain how this change in environment may have affected the evolution this frog population (not including possible direct effects of warmer temperatures and less rain on the frogs). Include the following terms in your explanation: allele frequency, selective pressure, differential reproduction, beneficial trait, evolution.
They isolated bacterium in a pure culture and demonstrated that experimental healthy animals injected with this culture became sick. What other test do researchers require to perform to be absolutely sure that the bacterium is responsible for the dis..
What is basics of epidemiology, brief description on Understanding basics of epidemiology
Explain the challenges and advantages of having internal gills over external gills for gas exchange? Explain how increased stress levels can affect hormones which ultimately inhibit the immune system? Include all relevant glands and hormones in you..
What is the significance of the chloroplasts structural feature that the thylakoid membrane is located between the stroma and the thyloakoid space.
How is sex determined in grasshoppers? Can you find out other examples of organisms with a similar system of sex determination.What syndrome is defined by an XXX genotype.
A previous study has shown that freckles gene is located at the locus marked F, and hair color gene is located at the locus marked H, both on the long chromosome.
An inbred mouse that expresses Db and Kb is crossed with an inbred mouse that expresses no class I MHC. The F1 offspring are all DbKbKk.
Which type of pressure is responsible to maintain the erect position of a plant? turgor pressure Osmotic pressure Diffusion pressure
Describe the process of muscle contraction and how a neuromuscular blocking agent, as in metubine, would interfere with muscle contraction.
A man with a chin dimple and a non dimpled woman produce eight children, all having the chin dimple. Can you be certain of the man's genotype? Why or why not? What genotype is more likely, and why gives reason.
Male frogs give calls that attract female frogs to approach and mate. Researchers examined mating calls of closely related tree frogs in South America. What outcomes be able to occur where the ranges of two species overlap.
Studying and predicting results of experiment conducted with mutant mouse. A researcher recently found out a mutant mouse with an interesting T cell phenotype.
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