Barnacles Lab Report

In our fourth and final lab for Biology 100, we are dealing with the beetle larva mealworms. This worm-like animal is, in fact, not a worm; they are larva for the tenebrionid beetle. These larvae are most commonly used in order to feed household pets. For example: reptiles, fish, and birds. Tenebrio larvae are also considered pests to the most businesses.

The hypothesis was supported because the density of soils with the presence of earthworms had decreased and the pH of the soil changed, becoming increasingly neutral. It was hypothesized that if earthworms are placed into a container of soil, then the pH of the soil will become increasingly neutral and the density of the soil will decrease because the digestive tracts in the worm produce molecules that are natural buffers and because worms aerate the soil, leaving pockets of air in the soil, increasing the volume of the soil. The tests on soil pH showed that the pH of the soils in both positive and negative controls, which started at a pH of 7 remained at 7, while the pH levels of the 6 pH increased to 7 (see Figures 7 and 8) and the pH of

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.

Citrobacter Freundii is a species of bacteria that can be potentially harmful to humans. It is known to cause meningitis by protruding into the brain and replicating itself (1). The Citrobacter species has also been found as a cause of some urinary tract infections, diarrhea, and even gastrointestinal diseases and symptoms (3). C. Freundii can be located in a wide variety of soils and water (3). Lastly, it is also the cause of many nosocomial infections due to its presence in water (1).

Observation: no bugs were found except small, black, gnats were all close to the ground.

This investigation was constructed to determine how the Acorn Barnacles respond when the current is changed in their environment. The hypothesis was that if barnacles are placed in a small cup and the current of the water changed, then the barnacle activity will decrease because the current with slow them down. The outcome of this investigation supported the hypothesis.

An association between enzyme production, gene copy number, and gene evolution was explored by conducting analysis of the salivary amylase enzyme, AMY1A gene copy number, and the ancestral starch consumption in Homo Sapiens (Tracey 2017, p.22). It was hypothesized that the relative amount of starch consumption was very high for my personal ancestral diet, thus my AMY1 diploid gene copy number in my genome and salivary amylase concentration would be significantly higher than the population mean. With a population of 28 subjects (n=28), individual saliva samples were collected and compared to a calibration curve to determine the approximate amylase concentration by analyzing absorbance values. Individual samples of buccal cheek cells were

The purpose of this experiment was we were trying to see if the number of arthropods would be significantly different in sparse and dense areas of the woods. Ms.Ehnert provided us with the design of a trap to set up in the woods so we could more actually count the amount and types of bugs that we find. The trap was a cup filled with anti-freeze that we put in the ground and then covered it with a paper plait, but raised it so bugs could get in and bigger animals couldn’t. We waited for a week to collect the results and then counted all of them and sorted them. My hypothesis was based off of common sense, the simple assumption that less trees equals less arthropods and more trees equals more arthropods. I knew that living things need a habitat

Crayfish are crustaceans that are a part of the phylum arthropoda. Similar to the lobster, an organism within the same phylum, crayfish breathe via feathered gills. It is the use of these gills that allows oxygen uptake and thus the ability to survive in freshwater environments.

Only one method of planktonic sampling was used so comparison with another method of sampling cannot be done. It is safe to assume that the most appropriate method of sampling in these areas was previously determined by the lab instructor. Isolation of organisms in the samples was met with some difficulty as there was very little life to be observed. Once isolated however, a general identification was simple with the use of the “quick picks” section of the Marine Invertebrate Zoology Lab Manual. One particular organism isolated from the “T-docks” samples, a foraminiferida, was chosen for scientific drawing (Figure 1).

Figure 1. shows the average leaf mass decomposition rate for invasive species leaves and native species leaves Results Explanation – In the experiment, we found that the invasive species leaves have a isopods faster decomposition rate than the native species leaves. The treatment used in the experiment differentiated only where the 1 gram (each) of the two different types of leaves were used. At the end of the experiment, the leaves had little to no moisture left to them and the 2 isopods were dead. Discussion – 1)

Planktons! You can find them in several places on the Earth. In oceans, seas, and lakes! These organisms are those that drift, and are incapable or have little or no ability to swim. Due to that, they are moved and taken wherever by the currents of water based environments. (http://www.sciencedaily.com/terms/plankton.htm) Not to mention, they are also an important food source to many large aquatic organisms. For instance, fish and whales. (https://en.wikipedia.org/wiki/Plankton) In this lab experiment, “Battle of the Plankton”, groups of students are to make their own planktonic organism out of household items that will (hopefully) have the characteristic of sinking slowly when placed in a large tank filled with fresh water. They will have

Materials: Scale, potato slice, big tub, small cup, petri dish, big tub lid, mealworms, tape, BTB, and a pencil.

The ecosystem with which the simulation is being done is an aquatic ecosystem. This specific ecosystem is home to producers such as: black pine, coral weed, and nori seaweed. Stationary consumers like acorn barnacles, gooseneck barnacles, and mussels are also present. Mobile consumers such as chitin, starfish, and whelk. The invasive mobile consumer is the green crab. Animals such as starfish compete with others like green crabs for mussels. Starfish and whelk prey on and also compete for the gooseneck barnacle. Whelk and green crab also compete for the acorn barnacles. The competition between starfish and green crab over mussels is what led me to my hypothesis as the mussel is one of the largest secondary consumers in terms

The outcome of this lab proved for the prediction to be true. The organisms in the aquatic chamber died out and the water quality slowly deteriorated before the lab ended. Although the organisms eventually died, there was a time when the aquatic chamber was able to support life. The aquatic chamber had its own food chain where the fish ate the plant to stay alive. Furthermore, the water quality of the chamber began to deteriorate over the few weeks becoming a cloudy murky brown color.