Worm Lab Report Essay

The dependent variable is pulsation rates of L. variegatus before and after they were in the treatments. The standardized variable of this experiment would be the temperature of the surroundings of the L. variegatus, the three pulsation rates taken for each worm before and after the treatments, and also the amount of time each worm was kept in their respective treatments. The level of treatment for this experiment would be ten because of the six different concentration treatments of caffeine and nicotine along with the four household drugs. The sample size of the experiment differed from some treatments to other. For the three different concentrations of caffeine and nicotine, the sample size was 18 black worms each. The sample size of the control treatment of week 1 was 6 black worms. 12 black worms were used for the control of week 2, decaffeinated coffee and instant coffee. 11 black worms were used for the tea treatment and 15 were used for the tobacco treatment. There were three replications of the pulsation rate readings per worm before and after the treatment. With all this information we were able to get the results we got.

The purpose of this lab was to save a little gummy worm named Sam from drowning. In addition, one of the labs key terms was a hypothesis which is a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation. Furthermore, we also learned that an independent variable is a factor that is changed during the experiment. On the other hand, the dependent variable is the factor that is observed or measured during the experiment. To begin with, the experiment the hypothesis formulated was if we reshape the paperclips into hooks and pick up sam, and the lifesaver (without touching them), then the lifesaver would be stretched enough for Sam to go through it.

Temperature and environment plays a key role on the effects of an ectothermic organism’s metabolism. The specific ectothermic organism used in this study was the Gromphadorhina portentosa also known as the Madagascar Hissing Cockroach. In this study we measured CO2 production (%) and temperature (̊C) every three minutes for a total of 15 minutes in three different temperature environments. The three temperature environments conducted in the experiment included room temperature, a cold environment (ice bath), and a hot environment (how water bath). The purpose of this study was to test the effects of temperature change on

Freeman (2008) furthers Eckert et al’s argument by stating that the actin filaments of the muscle cell in organisms are able to intake ATP (adenosine triphosphate) faster and will move the organism faster when higher temperatures are imposed. This is because of an increase in enzyme reaction rates (Freeman 2008). These arguments can be applied to our experiment to help explain the trends observed. It can be argued that as the Gammarus setosus experiences the cold treatments, the organ of Bellonci senses the cold temperature, which in turn signals the organism to preserve its energy to protect itself; therefore, the organism will swim slower. In addition, the enzymes in the muscle cells of the organism, when experiencing the cold treatments, will have decreased ability to carry out enzymatic reactions, therefore inhibiting the uptake of ATP, which will cause the organism to swim slowly. Conversely, as the organisms are put into the heated treatments, the organ of Bellonci senses the heat, and allows the organism to swim faster, since it does not have allocate as much of its energy towards survival. Furthermore, the enzymes in the cells will be able to catalyze reactions more quickly, therefore allowing the organism to swim faster. However, when the temperature of the surroundings is too high, the enzymes will denature, therefore, reducing the activity rate of

Firstly the main apparatus was set up (a retort stand with a bosshead and clamp attached)

The lab handout provided by the instructor was used as a guideline to conduct this experiment. The only difference was the organism used and data collection period. For this experiment, pill bugs and crickets were utilized. Also, data was collected for a period of 12 minutes.

direct calorimetry. Furthermore, the amount of oxygen in the chamber reveals the amount of cellular respiration of the organism. While also, test the effects of decreasing oxygen, and later increasing the heat on the metabolic rate of goldfish. I hypothesize that an increase in temperature will increase their metabolic rate

A reason why the mealworms produced more carbon dioxide could be because they are more active organisms. When organisms move around more, they need to use more energy, which in turn leads to more CO2 being produced and released. For example, an active organism like a human will

The Effect of Temperature on Animal Respiration Renee King 001420538 TA: Oliver Biology 3U03 L01 This lab examined the effect of temperature on the rate of oxygen consumption by measuring VO2. Effects were observed in goldfish, frogs, and mice, which each use different mechanisms for thermoregulation. The average rate of oxygen consumption by goldfish increased from an average of 0.175 mL g-1 h-1 at 5֯ C to 0.288 mL g-1 h-1 at 25 ֯C which was a 64% increase. The average rate of oxygen consumption by the frog was higher at 5֯ C than at 25 ֯C. At both temperatures, the rate of oxygen consumption increased over time.

The respiration rate of the goldfish is done through their gills where there is a collection of dissolved oxygen from the water and a release of carbon dioxide (shmoop); this is a way for the organism to exchange gases in their environment (Campbell, 889). During the experiment there are some variables to consider that affect the result such as the dependent variables: the healthy of goldfish, and size. While the independent variables is time. The affect of different temperatures to the goldfishes’ respiration rate is to be taken in consideration when taking a closer looking to the metabolic-reaction rates and processes, which include digestion, respiration and immune response (shmoop). The temperatures varying for cold to warm are to be gradually changed in order not cause a sudden shock and death to the goldfish.

1.) My hypothesis that the insects would be most repelled by the lemon plant extract was not supported. Our key findings in the experiment do not support my hypothesis because the lemon had a 60% repulsion response and was the second most repulsive behind orange with a 70% repulsion response. Although the Earthworms were repelled by the lemon plant extract, they were more so repelled by the orange plant extract. 2.)

Ectotherms like Gryllus (Niehaus 2012), commonly known as crickets, instead depend on external sources for their body heat. Ectotherms must use the environmental energy and behavioral adaptations to shift their body temperature. The basal metabolic rate (BMR) is a measure of the rate at which an organism releases heat after breaking down food molecules. Crickets possess the ability to respond to thermal change by

The study shows that any release of carbon dioxide is happening in a very gradual manner that is taking far longer than originally was thought would occur, which is good news for the Earth’s environment.

The glow worm’s habitat is undisturbed woodland and caves around the world. Glow worms are mostly active during night which is when they can be seen glowing. They are one of the few insects that are found inside the Arctic Circle. The glow worm is famous for having a green and yellow colored light on the end of its tail. Glow worm’s main prey is snails, slugs, and insects. Their predators are spiders, birds, and centipedes. The glow worm’s conservation status is threatened and the number of species is 12. The average lifespan for a glow worm is up to 5 months. A glow worm is an omnivore and is up to 1-2 inches long. The glow worm also has a shell like skin type.

The results of this experiment supported (accepted) the hypothesis, that was “The mealworms will prefer the colder area because the worms are nocturnal.” Four out of the six mealworms went to the cold side of the container and stayed there for the whole 10 minutes, and only two out of the six mealworms went to the warm side. The reason for these results could be that since mealworms are nocturnal, darker areas must be cooler than lighter areas because light makes places warmer. So this means that mealworms prefer darker and colder environments better.