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A group of single cell organisms collected from the ocean was brought into the lab for examination. The lab assistant was concerned that the water had become full of toxic waste products and so added clean water to the culture. All of the organisms died, and when she looked at them under the microscope, all she could see were bits and pieces of them scattered throughout the water. What likely happened? A group of single cell organisms collected from the ocean was brought into the lab for examination. The lab assistant was concerned that the water had become full of toxic waste products and so added clean water to the culture. All of the organisms died, and when she looked at them under the microscope, all she could see were bits and pieces of them scattered throughout the water. What likely happened? a.She added sea water to which she had added too much salt, and they ruptured. b.She added water that was hypotonic to the culture of organisms, and they ruptured. c.She added too little salt to the sea water she added, and the organisms all lost too much water and shriveled up. d.She added water isotonic to the organisms, causing too much water to move in and out of the organism, and they ruptured.
If a population of snails on the mainland has an allele frequency of p = 0.9 and the allele frequency on an island is p = 0.2, what will the allele frequency be on the island after one generation of migration with m = 0.1 ? Show your work.
Discuss how does evaporative cooling contribute to the stability of bodies of water while also preventing from overheating?
Axel is a fishery biologist inspecting a bay in which insects feed upon algae, fish feed upon insects, and crabs consume the remains of fish that die. In this example, how would you classify a crab?
Discuss how much of a 10X buffer would I add to a reaction whose total volume will be 20?L?
Discuss why is even weak selection still stronger than drift in very large populations at non-neutral loci?
How is "pollination" different than "fertilization"? Explain and draw the structures and the process of angiosperm fertilization. What is double fertilization and why is it necessary.
What measures would you suggest in the plan to actually reduce health risks? How would the plan allow the public to recognize pathogens are related to cause of diseases and other health problems?
A cell can use many kinds of organic molecules as fuel for cellular respiration. Distinguish between the use of lipids, carbohydrates and proteins.
Describe the etiologies, pathophysiology, and manifestations associated with the inflammatory diseases of the heart: rheumatic heart disease, endocarditis, myocarditis, and pericarditis.
During mitosis it is important for sister chromatids to stick together (called "cohesion") during some stages and then separate. Researchers have identified proteins called "cohesins" that are involved in sister chromatid cohesion. If you wanted t..
A physician orders Tylenol for a temperature greater than 101 degrees F. The patient's temperature is 100.4 F. Explain the rationale for not medicating a fever of 100.4 F. Why do schools require inoculations for childhood diseases such as mumps, m..
Mutation can affect the genome in many different ways. For now, consider mutations that (1) result in changes of the third codon position, and (2) result in changes of the first codon position.
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