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They have a shell like exoskeleton which progressively shed as they grow. The shedding occurs in two stages were the back half sheds first followed by the front part later usually after two to three days later as opposed to the way moulting process occurs to other antropoda where the cuticle are shed in a single process. Metabolic rate is temperature dependent in woodlice which is in contrast to mammals and bird where their rate of respiration depends directly to the external environmental temperatures (Jordan 100). Woodlice are claimed to have unpleasant taste like that of a urine despite been a crustacean which is different from the taste of other crustacean like lobsters or crabs. Woodlice breathe through their plepodal lungs and live in terrestrial environment usually damp or dark places to reduce the rapid rate at which they lose water through their cuticle and excretion (Sutton, Stephen, Paul, and David 67). Although woodlice are preyed by a wide range of insectivores it’s the spiders that prey on them exclusively. This experiment was conducted to determine the relationship between the variation of traits and the natural selection and the hypothesis of this experiment was that the predator preying on the woodlice determine the speed of woodlice to be found in an environment (Smith, Siân 98).
The length and dorsal plate in all woodlice was measured using a microscope and recorded. The speed of three woodlice was obtained by taking two rulers to measure the distance and then assorted utensils for simulating predation and to mimic a predator was simulated and the timer was set from the time all the three woodlice started moving until they all reach the end of the two rulers and then recorded in seconds.
Woodlice where placed in large specimen dishes and the predator for this experiment which was a spider was simulated RESULTS The woodlice traits were varying as like were the highest standard deviation error was obtained from the speed and the lowest standard deviation error was obtained from the length while the standard deviation error was zero as illustrated in table(1) below Trait Dorsal plate number Speed (seconds/10 cm) Length (cm) Color (values using soil color chart) Mean 7 21.20833333 0.991666667 5.083333333 Standard Deviation 0 +10.29131828 +0.21450989 +1.248187091 Standard Deviation Error 0 +2.100706547 +0.043786648 +0.254785123 Table (1) showing traits, mean, standard deviation and standard deviation error of woodlice In the frequency distribution below blue represents the total number of woodlice while the red represent the number of woodlice that survived after the predator was unleashed. From the graph the number of survived population is higher than the total population between the speeds of 1-20 and the same is exhibited between the speeds of 21-40 and between the speeds of 61-80 but between the speeds of 41-60 no woodlice survived. Frequency distribution of woodlice characterized by speed DISCUSSION From the table and the frequency distribution above it is clearly that there is a relationship between the population of woodlice that survived the experiment and their speed. Woodlice that were much fast and those that are somehow slower survived more compared to those that were of average speed as none of them survived and also the predator
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Name Tutor Course Date Woodlice Lab Report Analysis Introduction Woodlice have been considered to have several species that roll up in perfect shapes as ways of defense. Unlike other crustaceans, woodlice are found on land but can only survive in moist surroundings.
To ascertain how the theory of Darwin works, the author included a number of woodlice in the experiment and certain traits that seemed to be linked to evolution were considered, they include weight, size, sprint time and the number of dorsal plate. Conspicuous variation existed in some of the traits such as weight and sprint time.
In addition, the teachers are also faced with the task of identifying the talents in these children in order to help nurture them accordingly. This paper takes a look at two examples where teachers engaged students in different activities in order to achieve develop the desired skills.
Moreover, Scorpions and Ticks have also known to originate from the same family of insects. One of the main characteristics which are usually common in almost all spiders is the ability to bite. Most of them have fangs through which venom is secreted. Almost all kinds of spiders are poisonous to some extent.
URL of webcam: http://www.worldlandtrust.org/webcams/ornithos Species within the view of the Webcam 1. White butterfly-like insect The white insect appeared twice between 20:30:19 and 21:00:19 Brazil times. The insect flew around the trees and disappeared towards the left side of the webcam.
The findings regarding the behavior of pill bugs will shed light on human psychology as well especially when it comes to feeding, sheltering and problem solving. Based on a study by Refinetti (2000), the pill bug must possess an endogenous circadian pacemaker that does help it distinguish light from dark environments.
But such is the indeterminate subjectivity of both films-the contradictoriness of their characters, their unresolved ethical dilemmas, their wryly tragicomic representation of conflicted histories and divided allegiances-that they end up striking an ironic attitude to their own radicalism.
As the paper, Rolling Over the Native Culture, declares the Spanish introduced the horse to North America in the 16th century. The horse was a superior tool for the Native Americans as it provided them with much greater mobility, allowing the Indians to travel greater distances and expand their territory.
There is always a motivation factor behind it.1
kinesis or taxis phenomenon are innate behaviours that are exhibited by organisms. Kinesis behaviour is a behaviour in which an organism changes the rate of its
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