Ap Bio Butterfly Research Paper

Insect is an animal category that has a hard body on the outside knows as exoskeleton which are animals with three pairs of leg. They are recognized the insect which have evolved from worm-like ancestors. Through research by today’s researcher, he found that, “these insect ancestor were wingless and developed without metamorphis, for an example as silverfish that were present today” (Barnes, 1987). Insects have a lot of interest as their habits are the most diverse among other kingdoms, their complex life cycles, unique behaviour and adaptability, and their importance to the human kind. These insect’s body are divided into three parts which are head, thorax and abdomen (Susan, 2012). Butterfly is a beautiful insects. Butterflies have its own …show more content…
This stage also known as a caterpillar which cited by David (2004), caterpillar have hairy varying bristles or spike to prevent from getting eat and either be a naked one without spike or hair. Most caterpillars are herbivirous and their feeding types are foliage, roots, seeds and flowers that are base on their own species (Miller & Hammond, 2003). The larvae digestive system begins with the mouth, leads to the esophagus, and to the malpighian tubules, where nitrogenous wastes are filter and ion regulation takes place. The malpighian tubules lead toward the hind intestine and finally to the rectum, through which the wastes are eliminate (Douglas,1989). Caterpillars grow through time and increase in size each time they shed their skins which also known as molt. After molting, their skin is shed and develop a new one underneath which stretches and allows new growth. “They grow in the egg and then emerge throgh the shell, which they sometimes eat” (Miller & Hammond, 2003). Hadley (2014) noted that the caterpillar usually said to be five instar. “They may take a break from eating as it preparing to molt as it has to reach second instar” (Hadley, 2014). The caterpillar continues this cycle by eat, molt, poop, molt until it reaches the final instar. Once the caterpillar stop eating the host plant, it hangs upside down from a leaf into a chrysalis (Jabr, …show more content…
According to Miller and Hammond (2003), a butterfly pupae is commonly known as “chrysalis”. During this stage, the caterpillar starts to grow rapidly and totally rebuilt by differentiating into different tissues. Once the caterpillar reach its maximum size until it looks like a giant droplet, it change behaviour and stop feeding and begin to create a site for pupation. This process are rapidly occur and last for two to three weeks or prolonge that last more than a year. Brower (2007) noted, that inside the fifth instar, the hormonal changes take place by losely all it interest in feeding. The hormonal changes take place by wandering around and then spins a little silk pad (Brower, 2007). The silk pad is then spin on the underside of a leaf and the larvae (caterpillar) evetually turns around and grab the silk pad with its hind legs that have a little anchor to that chage from larvae to pupate (Brower, 2007). Brower (2007) stated that the caterpillar begins to change its form once those silk anchor pad is drops down. However, chrysalis occcur with the break down of the caterpillar body parts through process histolysis (Hadley, 2014). During this process, Hadley (2014) stated that there is special groups of transformative cells which remain hidden and inert during the larvae stage and now become the director of the body reconstruction. The deconstruction of caterpillar into a viable butterfly is cause by biochemical

Related Documents