In birds and reptiles, the allantois stores nitrogenous wastes. Indicate whether the statement is true or false
True
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The growth of bacterial cultures is best described as
A. arithmetic growth. B. lag growth. C. logarithmic growth. D. cell division. E. replication.
In which of the following ways does species richness affect ecosystem function? (Check all that apply.)A) Low species richness can contribute to ecosystem stability.B) High species richness can increase ecosystem resistance to drought.C) Low species richness can make an ecosystem more susceptible to invasive species.D) High species richness reduces overall ecosystem productivity.
What will be an ideal response?
Consider Mendel's experiments involving the trait of round versus wrinkled peas
In some experiments, Mendel's method involved removing the anthers that produce pollen from the flowers of the round peas and applying pollen from the anthers of the wrinkled plant. What would have happened if Mendel had missed some anthers he was trying to remove from the flowers of the plants that produce only round peas, and observed the peas produced by a plant that had a mix of round and wrinkled pollen? (Indicate which of the following MUST be true.) Comments: This problem is more complicated that it might appear at first. For example, if the parent with some of its own anthers and some introduced pollen has a phenotype that results from a homozygous dominant genotype, the F1 would all appear to have the dominant phenotype even if some recessive pollen grains were introduced. However, if the parent had a recessive phenotype and mixed pollen, the results would differ. Remember, the 9:3:3:1 ratio is when two different genes are involved. A. The F1 peas produced would have mixed phenotypes. B. The F1 peas produced would have a single phenotype. C. The F2 peas would have phenotypes in a 9:3:3:1 ratio. D. The F2 peas would all have the phenotype of the parental plant with the anthers not properly removed. E. The F1 peas would have phenotypes in a 1:1 ratio.
Carbon dioxide is the most abundant greenhouse gas in the atmosphere. What is its current concentration?
A. 1.5 ppm B. 1.75 ppm C. 385 ppm D. 560 ppm E. 700 ppm