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Q1. Most antibacterial drugs disrupt or destroy bacterial cellular characteristics that are different from those of eukarytoic cells or that might not even be present in eukaryotic cells. List and describe at least three cellular features of bacteria that could be targeted to inhibit or kill bacterial pathogen.
Q2. A student wanted to study an effect of nitrogen fertilizer on plant growth, so she took two similar plants and set them on a windowsill for a two-week observation period. She watered each plant the equal amount, but she gave one a small dose of fertilizer with each watering. She collected data by counting the total number of new leaves on each plant and measured the height of each plant in centimeters.
Which is a significant flaw in this experimental set-up?
Food remains in the stomach for several hours. Passage of food through the small intestines also requires several hours. These two organs have very different shapes. Explain why they are able to retain food for so long, for efficient digestion and..
How does your answer make clear that why antibiotic resistance evolves so fast. What is the equilibrium frequency of the resistant allele in the absence of methicillin.
Research global warming on Web and write the final report outlining the path for the U.S. to follow to address the issue of global warming. Include at least three proposals for the US to follow, plus use a minimum of three different websites or books..
Can viruses evolve? Why or why not? a. No, only their hosts can evolve. b. Yes, their genetic make-up responds to natural selection. c. No, they are not alive. d. Yes, they are able to alter their genetic code directly in response to selection pre..
In a mark-recapture study to estimate the size of a rabbit population, researchers catch and mark 290 individuals. Two days later, they again capture the same number of rabbits and find that 40% of the individuals are marked.
How is the circulatory system of reptiles characterized? What is the basic difference between the reptile and the amphibian heart?
what structures connect the fetal blood to the mother's blood?
Tracey had been slightly concerned about trace glucose that was found in Max's urine 6-hours after his exercise until she found that he had eaten an entire large pizza an hour before the urinalysis.
Which of the following is not one of the ways to describe a population in terms of population ecology?
DNA sequences are used quite often to evolutionary relationships between species. Explain why is the DNA sequence of one gene a less accurate indicator of the evolutionary.
One of the most interesting concepts in animal evolution is the relationship between the phylum Echinoderms and the phylum Chordates. Humans belong to the phylum Chordata.
The following sequence represents the region upstream (5') of a coding region where the first codon is indicated. Using the sequence provided for the 3' end of the E. coli 16S rRNA,
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