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Field observation suggests that populations of a particular species of herbivorous animals undergo cyclic fluctuations in density at 3 to 5 year intervals. Which represents a plausible explanation of these cycles? a. Periodic crowding affects the endocrine system, resulting in increased aggressivesness b. increases in population density lead to increased rates of predation c. increases in rates of herbivory cause changes in the nutritive value of plants used as food d. increases in population density causes more proximal infestations of parasites to host animals e. all of the above
what type of bio compatible material is usually inserted into the brain as a device and what is usually the size of it ?
What is the effect of added succinate to rotenone-blocked, amytal-blocked, or cyanide-blocked mitochandria? In other words, can succinate help "bypass" the block? Explain.
In a species of plant, two genes control flower color. The red allele is dominant to the white allele; the color producing allele is dominant to the non-color producing allele.
In a population of flowers growing in a meadow, C1and C2 are autosomal codominant alleles that control flower color. The alleles are polymorphic in the population.
Explain why a woody plant tends to produce more branches when it is pruned. How are both auxins and cytokinins involved in the regulation of branching?
Describe the hemolysis produced by alpha-hemolytic, beta-hemolytic, and nonhemolytic streptococci.
Explain what occurs during the Krebs (citric acid) cycle andelectron transport chain by describing the following.
Assume that the genes are located on separate chromosomes. An F1 is produces by crossing the original mutant A with the original mutant B. This F1 is testcrossed: What propotion of testcross progeny will have no trichomes?
This one requires that you think about what limits the respiration rates in states IV, III, and in uncoupled mitochondria. Which of the following situations should produce the fastest rate of respiration? Let the substrate be the same in each case..
Using the provided DNA code, derive the correct amino acid sequence. Describe the necessary steps to arrive at the amino acid sequence, and explain each in detail.be sure to list the mRNA sequence.
what happen if any did the UMP have on the activity. An investigation was set up to observe the effect of varying concentrations of the substrate galactose(S) on the rate of reaction of the kinase,v, with and without an added artificial nucleoside ..
What group of organisms would make up the largest level of a biomass pyramid for a grassland ecosystem? What kind of organisms might make up the next level?
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