Goldenrod Lab Report

8. Draw conclusions – Assuming that your experiment produced results identical to those seen in Table 4, would you reject or accept the hypothesis that you produced in question 3? Explain how you determined this.

This lab was conducted with the purpose of confirming the trait of homeostasis among goldfish. During the experiment, it was recorded that the fish would increase gill movement when placed in colder water two out of the three trials. However, the results showed no significant difference in gill movement in various temperatures of water. This has very little effect on the broad field of science since our only three trials were performed and may have included human error in the trials.

This investigation was designed to compare the height of Pteridium aquilinum in a light area and a dark area of Rushy Plains, Epping Forest and to establish if light intensity does have an effect on the growth of Pteridium aquilinum, commonly known as Bracken. From my research it was clear that the height of Bracken is affected by abiotic factors, other than light intensity, such as: soil moisture, soil temperature, air temperature and soil pH so I had to control these factors. I carried out preliminary experiments to find a suitable site where all these factors where constant. For my actual investigation I measure

The ravg for the experimental group was 0.1613 and the ravg for the control group was 0.2047. The results indicated that our predictions were correct; duckweed that received less light exhibited a lower rate of

Table 1. This chart shows that the observed number of sowbugs preferred grass 9 times, and sand 11 times. It also shows the expected data 10 for each preference.

At the conclusion of the experiment, the two hypotheses were reviewed. Because the water temperature did affect the normal respiration patterns of the goldfish, the null hypothesis was disregarded and the alternative hypothesis was accepted. From the results of this experiment, it was concluded that although other environmental factors could play

Find from the “Starting” and “stopping” locations of where you are going to measure. i.e., I am going to have Charles lay down and I will measure from the bottom of his feet to the top of his head

The results observed do not correspond with the outcome predicted by the hypothesis. Despite the nature of the subjects of the experiments, no substantial growth was observed. Only one seed of the 36 planted germinated, and it could only survive for a period of a week. The one seed that germinated reach a height of 1.2 cm. Table 1 presents the average growth observed in each quad. Each quad had a total of 12 seeds. No seeds were removed during the course of the experiment.

Competition happens between two or more things. In talking about plants they compete with each to survive. When competing against each other to survive they are using soil, water, nitrogen, and space. In using theses resources and having theses available gives the plant a greater chance in living. Even though plants compete environmental wise it is still scene that there is a lot of unknown to why plants compete. Some researchers believe it could be because of the root size of an individual plant or the size of the seed, which gives it better competition in surviving (Miller, 1995). Different types of competition can happen between plants likes intraspecific and interspecific competition. Miller (1995) believes there is not enough research shown to make a determination as to why competition between plants happens and that there should be research done in looking at the evolution of plants in different environments where they can compete with each other. In looking at competition in plants in class the experiment that we conducted looks at the Brassica rapa in a intraspecific competition in different densities. Miller (1995) found that the B. rapa in intraspecific competition did have increase in the number of flowers that were produced. Comparing this to the finding of Miller, when looking at different densities of plants in a interspecific competition could the B. rapa have more of a change in growth because a higher density will have more seeds and the B.

How did this compare to the ratio obtained from counting the corn kernels for ear number two in part III of the lab? (5 points) There was difference or one

The estimated sample to be taken should be 9 lettuce plants/ roots to have the 95% level of confidence and within the 10% of population mean.

Females lay white spherical eggs on the trunk, and produce a yellow viscous material from the ovipositor which is smoothed over into a covering, before fading to white or grey. Larvae exit the egg directly into the plant, never becoming exposed, and so are impervious to sprays. Young larvae are restricted to the cambium, circling the cane 3-4 times in a close spiral, girdling the primocane, and producing gall-like swellings. As larvae grow, they extend feeding deeper into wood and pith, and staightening the spiral and heading usually toward the distal end of the cane (tunnels may extend 15 cm below to 64 cm above the gall). Larvae reach a length of 12 mm, and have a pair of horn-like projections on the posterior end. The larvae are white and legless, with a flattened head (the family is often called flat headed borers). Larvae winter in the cane, and in March create a pupal chamber. The pupa is formed in late April. The pupal period lasts 20-40 days. When the adult leaves the pupal skin, it remains in the tunnel for about 10 days before chewing a D-shaped emergence hole. Adults feed on foliage for several days before beginning oviposition. They are most easily found on the plants on warm sunny days. There is one generation

In all four experiments, a total of 64 isopods were used. For each experiment sixteen isopods were placed in the middle compartment of the choice chamber, eight Porcellio scaber, and eight Amadillidium vulgare. In this experiment, weak forms of an acid and a base was used. Whether there is an acid or base used in the experiment is the independent variable and the number of individuals that chose the acidic chamber over the

The independent variable of this experiment were the different types of the solutions used, while the dependent variable was the mass of the cucumber slices. The constants were, the amount of liquid used and the time the cucumbers were left in the solution. While the control was the cucumber left in the cup with no solution. The students made a hypothesis saying that they believe that the cucumber slices put into the salt solution would decrease in mass while the cucumber put in the distilled water would increase in mass. In the end, the results of the experiment supported the students

1. Prepared 9 Vaseline Samples by stapling a white sheet of paper on cardboard and applying Vaseline on a pre measured circular area