Bio 150-Exam 1 JMU Verified Solutions

Bio 150-Exam 1 JMU Verified Solutions "A species of rats live in a certain type of tree with the branches evenly spaced. Smaller rats could not reach from branch to branch and larger rats would break the branches and fall. Soon, all rats were just the right size for the tree branches." is an example of.....? ️Natural Selection "Galapagos finches all have different types of beaks. During drought, the finches with the larger beaks survived better than those with smaller beaks. During rainy times, more small seeds were produced and the finches with smaller beaks fared better." is an example of? ️Natural Selection "In a habitat there are red bugs and green bugs. The birds prefer the taste of the red bugs, so soon there are many green bugs and few red bugs. The green bugs reproduce and make more green bugs and eventually there are no more red bugs." is an example of....? ️Natural selection "In an ecosystem, some giraffes have long necks and others have short ones. If something caused low lying shrubs to die out, the giraffes with short necks would not get enough food. After a few generations, all the giraffes would have long necks." Is an example of....? ️Natural Selection "In one ecosystem, lizards that had long legs could climb better to avoid floods and reach food." is an example of...? ️Natural Selection "Insects become resistant to pesticides very quickly, sometime in one generation. If an insect is resistant to the chemical, most of the offspring will also be resistant. Considering that insect generations can be a matter of weeks, insects in an area can become immune to a chemical within months." is an example of..? ️Natural selection "Rat snakes are all very similar except in coloring. Some are striped and some are green, black, and orange. This is due to living in many different types of terrain and adapting to the environment." is an example of...? ️Natural selection "The bacterium Pseudomonas metabolizes nylon; but, when a certain type of this bacterium that did not eat nylon was placed in an environment where nylon was the only food, the bacterium evolved until it ate the nylon." is an example of....? ️Natural selection A forest fire in SNP burns half of the oak trees in population near a campground. Is this an example of bottleneck or founders effect? ️Bottleneck A population is in Hardy Weinberg from generation to generation if what? ️A population didn't evolve, and didn't violate the 5 HW princples. Acclimation is not the same as adaptation because.....? ️Acclimation is not an inheritable trait An individual CANNOT make adaptive changes, but WHO can? ️offspring Can viruses be treated by antibiotics? ️no Can viruses reproduce independently? ️no Deer antlers being different sizes in a buck and doe is an example of ______? ️Sexual dimorphism Define 'adaptation' ️inherited trait that enhances the fitness of an individual in a given environment Define 'Biological fitness' ️relative survival & reproduction of 1 variant compared to others in the same population Define 'gene pool' ️All the genes in a population at a given time Define 'microevolution' ️small changes in the gene pool of a population over successive generations Define 'Natural Selection' ️process in which organisms with certain inherited traits are more likely to survive and reproduce than those without the trait (NOT RANDOM) Define 'Selective Pressure' ️Any situation that alters the behavior and fitness of