Most invasive species have a far greater impact in their new home than they did in the community in which they evolved. Why is this?
What will be an ideal response?
When a species leaves its community of origin behind, it also leaves behind the competitors, predators, and parasites with which it coevolved and which helped to keep its numbers in check. If the invasive species is a parasite, predator, or herbivore, it also leaves behind hosts or prey that had coevolved with it and had defenses against it. As a result, an invasive species often reaches a higher population density in its new home than it achieved in its old one.
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Fructose and galactose both have six carbon atoms, twelve hydrogen atoms and six oxygen atoms, just like glucose. A friend of yours says: "Since those sugars have the same number of atoms, they should have the same name." You Answer: "While they do have the same number and type of atoms,
A. they are all polysaccharides and have slightly different functions within organisms and therefore have different names." B. they are named differently because of their quaternary structures, which is very important in carbohydrates, especially glucose." C. they are named differently because when heated above their optimal temperature they become denatured and will not react with their substrates." D. they are named differently because they are involved in different DNA nucleotide formation." E. they are named differently because they are alternate forms of the monosaccharide, glucose."
Of the following lipids, which is found in approximately equal amounts in both the outer and inner portions of the lipid bilayer?
A) cholesterol B) glycolipid C) phosphatidylserine D) phophatidylethanolamine E) phophatidylinositol
According to research done by Baron and Prado, how do prions move within the CNS?
a. They use receptors on the surfaces of nerve cells. b. They use vesicles found inside the nerve cells. c. They use tunneling nanotubes. d. They pinch off the nerve cell membrane. e. They stick to the outer surfaces of nerve cells.
Explain how the overuse of antibiotics could lead to the evolution of drug resistant strains of bacteria.
What will be an ideal response?