Lumbriculus Viegatus Lab Report

Asexual Propagation is the process of using plant materials such as the stems, leaves, and roots to multiply the number of plants. These plants eventually grow to be a brand new plant that is genetically identical to the parent plant it came from. In several types of plants, asexual propagation is the fastest means of new plant growth. Asexual propagation is also a good way to maintain a plant species because they are genetically identical. In this process, adventitious roots are seen in the growing cycle. Adventitious roots are those that grow form parts of the plant that they normally would not grow from. The cuttings must do

Earthworms are found in the phylum Annelida. () They can vary in size. Their bodies are segmented which allows them to compartmentalize. The number of segments the species is born with will stay the same throughout their life. Normally, the number of segments found is similar within specimens. Remarkably, earthworms have the ability to regenerate lost segments. ()

This article studies the ability of regeneration possessed by the planaria. Morgan (1898) observes in different methods how the planaria are cut into smaller pieces, and then he observes the pieces to see if the planaria will regenerate. When the planaria are cut near the head, the pieces do not appear to regenerate, and the pieces cut too small also do not possess the ability to regenerate (Morgan, 1898). Pieces cut from the middle and the end piece of the planaria, however, have shown results of respawning from within the old tissue. When the author tried to fuse two sampled pieces together, he observed that the pieces formed a union (Morgan, 1898). However, the fusion did not last long, and the pieces died long after fusing together (Morgan, 1898). It is likely that the samples were not able to complete the regeneration after the union emerged. I will be able to use this report for my lab report as a reference to the process of taking samples from a live planaria, sampled from the likely

Dugesia tigrina are flatworms of the Turbellaria class that can live in saltwater or freshwater environments (Reddien and Alvarado 2004). These flatworms are also known as planaria and are notorious for their great ability of regeneration. The purpose of this experiment was to test if the regrowth of the planarian limbs was affected by light.

D) Sexual reproduction is more likely to increase genetic variation than is asexual reproduction. E) Only asexual

In this lab, an experiment was done in order to test how the abiotic factor of temperature affects a Tenebrio molitor’s activity level. Both experiments conducted consisted of two separate treatment trials; one in a warm environment (25 degrees Celsius) and one in a relatively cold environment (14 degrees Celsius). Results obtained from these experiments both showed a higher level of T. molitor activity in the warm environment as opposed to the cold environment where less activity occurred. In this case, the activity level of a T. molitor was measured by distance travelled (cm) over one minute. Prior to preforming the experiment, the prediction was made; An increase in environmental temperature will lead to an increased activity level of T. molitor. This prediction was made based on the knowledge of T. molitor being ectotherms. This is because temperature has been shown to have a major effect on an ethotherms growth rate and development rate, with higher temperatures being optimal conditions for both these to occur (Van Der Have et al. 1996).

Our organism is an R strategist, in summer season the worm population grows and in winter season the worm population dies.

were scrapped from the teeth and the second was an unknown given. It resulted that the unknown

Background- This lab is being done to demonstrate the effects of stimulants on the circulatory system of blackworms. In this lab, the stimulant we have chosen to use is Nicotine. A stimulant is an agent that causes increased activity, especially in the nervous or cardiovascular systems. In this lab, we will put blackworms into the Nicotine to look at the differences in pulse rates when compared to a control. The proper name for blackworms is Lumbriculus Variegatus, they are freshwater worms most commonly found in North America and Europe. The blood in blackworms circulates from the dorsal blood vessel toward the head through a series of

When the infective larvae on the pasture are eaten by the sheep they develop in the 4th stage larvae and become adults. This stage is called the host stage as they need to live inside a host (the sheep) or the worms will die. They live inside the sheep’s abomasum during which they lay eggs and will spend the rest of their lives and the whole cycle repeats itself

The organism studied in these experiments was the Spinacia oleracea that was obtained from a local grocery store in Lincoln Nebraska. One experiment that was conducted was used to determine the rate of oxygen production of Spinacia oleracea in the dark. Another experiment conducted was used to determine the effect of light intensity on the net photosynthetic rate of a Spinacia oleracea. The effect of light wavelength on the net photosynthetic rate of a Spinacia oleracea was also conducted and observed. The last experiment conducted was conducted to identify the pigments in Spinacia oleracea in order to determine its chloroplast chromatography.

Before starting the observations, the planarians had to be cut into sections using a scalpel, in this case, they were cut into three. To make them easier to cut, the were chilled on ice to slow them down.The flatworms were then put into separate labelled petri dishes, where they were then placed in a cool and dark area. After a few days, the worms grew and were easier to observe. From this lab, it can be concluded that planarians will regenerate no matter how they were cut. Wormy and Wormy 2.0, were both trisected transversely and were thought to grow into six new planarians, three coming from each worm, and one of them possessing two heads. The results observed for Wormy fully supported the hypothesis, and the three new planarians had a head,

Streptococcus pneumoniae is a bacterium pathogen that needs a host in order to survive, which are usually humans (Donkor, 2013). The bacteria is the cause of diseases such as pneumonia, meningitis, sepsis, and corneal ulcers. Some of the diseases S. pneumoniae causes are extremely harmful to humans and can even cause death in some cases (Mathos, Ferri, Figueiredo, Zangirolami, & Gonçalves, 2015). Humans, who already have a S. pneumoniae disease or have the bacteria simply in the upper part of the pharynx, transfers the bacteria through air particles, known as aerosols (Donkor, 2013; Lawrence, S. L. et al., 2015). In well populated areas or places, like schools, colleges, workplaces, S. pneumoniae is able to infect many humans

It is possible to assume that the worm consumed decomposing material within the terrestrial chamber such as the dead spotted roaches. It was clear that the spearmint plant wat doing living is good conditions at it grew a good amount throughout the thirteen days that data was collected. For the aquatic chamber, the food web is a bit more difficult to analyze. There was no clear difference within the aquatic chamber besides how the eelgrass began to slowly die and the water color slightly yellowed. It is obvious that the mosquito fish had some form of nutrients (most likely the eelgrass), otherwise it would have died within a few days due to starvation.

Arachnocampa luminosas live in dense woodland and carves around the world with the exceptions with the Americas Arachnocampa Luminosas are omnivorous animals but they tend to have a very meat based diet. They predominantly prey on snails and slugs which makes up most of their diet. Arachnocampa Luminosas are very small worms considered to be an animal species that is threatened with extinction as the glow worm population numbers are drastically decreasing. The main reason for the lower number of glow worms is thought to be the expansion of human civilizations glow worms are known to be particular vulnerable to change in their environment including habitat loss, noise and pollution. The skin type is shell like with black, brown, yellow, green,