Compare and contrast the chromosome structure of viruses, bacteria, and eukaryotes
What will be an ideal response?
The amount of DNA per structure (virus particle, bacterium, or cell) increases as one goes from viruses to eukaryotic cells. Viral chromosomes may be composed of single-stranded or double-stranded RNA or DNA, whereas bacterial and eukaryotic DNA is double-stranded. Bacterial DNA is considered to be a covalently closed circle; the "global" structure of eukaryotic chromosomes is uncertain. Although some proteins are associated with viral and bacterial DNAs, the regularly spaced histones of eukaryotic chromosomes are unique.
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Select the correct statement regarding the temperature response of the immune system.
A. When macrophages encounter invading cells, they release immunoglobulin-1, which is carried to the brain by the circulatory system. B. Interleukin-1 is a pyrogen, which can cause the neurons in the hypothalamus to raise the body's temperature, producing a fever. C. Fever contributes to the body's defenses by stimulating hyperhidrosis and causing the liver and spleen to store magnesium. D. Fevers above 99° F are often fatal.
When was the largest extinction in Earth's history?
A) the current time B) Cretaceous C) Permian D) Cambrian
Fertilization of plant gametes produces a ________________.
A. zygote B. gametophyte C. spore D. meiospore E. multicellular haploid plant
Suppose you have the following regression results from a regression of home prices on house attributes for a random sample of house transactions: CoefficientsStandard ErrorIntercept16310.04114.5Number of Bedrooms7295.31399.9Number of Bathrooms23473.04032.0r-squared = 0.302 Adjusted r-squared = 0.299If we assume that the proper model to predict the market value of houses is given by this regression, and thus we are getting unbiased estimates of the true relationships between number of bedrooms/bathrooms and sales price, what is the effect on sales price of increasing the number of bathrooms in a house by one, holding number of bedrooms fixed?
A. Approximately, $16,310 dollars. B. Approximately, an increase of 30%. C. Approximately, $ 7,295 + 23,473 = $30,768. D. Approximately, $23,473.