Based on the figures above, our prediction that an increase of JH hormone would cause an increase in the number of adult flies found in our sample was tentatively supported. We did find that a higher percentage of flies were adults in the JH treated vial; therefore indicating that the increase JH hormone did cause a sped up life cycle stage of the molting and hatching phases; however, the reduced number of flies in the JH vial in comparison to the water vials raises concerns that the population sample was not big enough to draw a conclusion or support our hypothesis. The water sample had 4 adults flies in comparison to the 3 in the JH sample, indicating that perhaps the reason there was a higher percentage of adult flies in the JH sample was simply because there were less flies and therefore the likelihood that the percentage of adult flies would be higher in the JH sample is greater. The reason we believed that the JH sample might produce more adults is because of the increasing JH hormone found in the molting and hatching stage during the life cycle of the flies; therefore, should the JH already be at a higher concentration early on in the hatching phase, the flies should progress through the phases at a quicker rate (Bownes and Rembold, 1987) However, there is some evidence that is contrary to our hypothesis. The overall larger sizes of the JH treated flies indicates that the flies had a longer life span and therefore had more time to grow larger, which would promote the idea that the JH solution decreased the rate at which the flies went through the life cycle.
Some of the more common divisions of marine creatures can be divided based on more obvious characteristics. Ambulacraria can be remember as "things that can move" coming from the word "amble" which means to walk slowly. Echinoderms and hemichordates both share larval forms and one species of pterobranches have a set of pharyngial gills. Conversely, acorn worms have pharyngeal pores. Chordates on the other hand, share a defined set of synopomorphies; the presence of pharyngeal gills, a dorsal hollow nerve, a notochord, a post anal tail, and an iodine fixing gland. Interesting, tunicate larvae have all the characteristics of chordates before undergoing paedomorphosis. As a result, it has been determined that they are the sister group to modern vertebrates.
In this lab cyclohexanol was put through dehydration via phosphoric acid and heat. The end product resulted in a 97% yield and 100% purity of synthesised cyclohexene. The purity and identity of the synthesised chemical was determined through GC and IR. The data from the GC shows a relatively short retention time from the injection point to the large peak. Cyclohexene has a boiling point of 82.146 oC, this correlates to a short retention time. The relative area was calculated by an electronic integrator, which found the sample 100% pure. The results of the IR shows a strong peak at 3022.45 cm-1 represents stretching between a hydrogen and a carbon which has a double bond to another carbon. A weak peak at 1653 cm-1 represents the stretching of a carbon double bonded to another carbon. This small or weak peak indicates the presence of only one double bond.
Certain species of animals at UMass are notorious for their interactions with humans. These species include the ducks in the campus pond and the campus squirrels. The Eastern Gray squirrel, Sciurus carolinensis, is an abundant species here at UMass, as well as throughout the eastern United States. I will be studying the Eastern Gray squirrel. I chose this organism because it is easy to find around campus, and they are interesting and quirky creatures. Replicating the methods of my project should be easy and entertaining. I am not sure yet what factors I am going to control in my methods, but I am going to continue thinking about it. It will probably be difficult trying to control a variable that involves a wild animal. This species is polygynandrous, meaning that they have multiple different mating partners during a breeding season. Females typically have 1-4 offspring per litter, and the species typically breeds twice a year. The Eastern Gray squirrel has an average life expectancy of 12 years in the wild due to predation and hazards of human impact on their environment.
I want to photograph a white ash outside of morrill. The scientific name for this Fraxinus Americana. Cavity excavating and nesting birds often use the white ash and it is native to eastern and central North America. The white ash is approximately 80 feet and has Seminole flowers. It is a fruit bearing tree. I would need to control for seasonal factors so the tree doesn’t start foliage. In addition, time of day could impact the tree and weather could affect how the tree looks as well!
Once the glucose is catabolized the electrons are transferred to electron carriers. These electrons combine with the electron carriers and they form NADH + H, NADPH + H, FADH2, respectively. The electrons are normally accompanied with hydrogen molecules. Transferring these electrons from the electron carriers to the electron transport chain, creates a proton motive force which fuels the synthesis of ATP. Finally the electrons wind up on the terminal electron acceptor.
The results of the experiment showed as more weights were added the tension in the string increased. With each added weight the speed of the wave increased, this is due from the frequency of the string staying the same and the wavelengths increasing along with the tension and speed of the wave. As the frequency was elevated to create more antinodes the wavelength decreased and the speed of the wave stayed relatively constant through each trial. With each trial increasing the tension resulted in a higher frequency being needed to create the desired number of antinodes from the previous trial
Family trees are produced by comparing shared characteristics. These characters must be homologous in order for the tree to be valid. Of note are two branches; the protostomata (stomach forms first in blastula) and deuterostomata (stomach forms second after the anus in blastula). Protostomata generally undergo spiral cleavage as part of their first cell divisions while deuterostomata undergo radial cleavage. Deuterostomata also experience a "pinching off" of the mesoderm from the endoderm while the mesoderm of the Protostomata form separately. Finally, cell fates are generally determined much earlier on in Protostomata than in deuterostomata.
After waking up, a good part of my day consists of walking, and on Thursday, I took relatively long walks on seven different occasions. These walks consisted of going to the gym, walking to class, walking to the dining hall, and walking back home, all whilst listening to music on my phone. However, the bulk of my dad consisted of sitting in class and listening to lectures on java programming, and ichthyology or discussing the genetics and treatment of cystic fibrosis. In between all of this, I found time to eath breakfast, lunch, and dinner, which consisted of a protein bar, grab n go, and a sandwich and salad, respectively.
Hormone signaling is essential towards understanding many mechanisms, such as growth, in organisms. In the Drosophila fly, these hormones are essential in progressing through the fly life cycle. Hormones are peptides that transmit chemical messages to cells and therefore have a specific effect on these cells. Drosophila flies are therefore useful as model organisms when studying hormones, specifically hormones affecting life cycles, due to their quick generation time and use of hormones to progress through the life cycle.
For example, JH, juvenile hormone, progressively increases in the hatching and molting phase, and then decreases during pupation. In contrast, another hormone, Ecdysone, is present during the pupa stage of the drosophila life cycle.