| Fill in the missing word.In anatomical terms, the brain lies ……. to the eyes.Answer…
5) the specificity of an enzyme is due to its activite site. The active site is shaped so that only a certain…
This experiment was conducted to study the relative fitness of two phenotypes of the Drosophila melanogaster and how fitness can affect evolution in the population. The phenotypes were placed in two different environments, one in which contained a predator and another with no predator. Results of the experiment would show how the fitness of each phenotype is affected by providing a mechanism, and if evolution was occurring in the population. Two hypotheses were inferred, one for each environment. For the cage uninfluenced by a predator, we hypothesized that evolution would occur due to sexual selection, and that sexual selection would be in favor of the wild-type drosophila. For the cage containing the predator, we hypothesized that the vestigial flies would have a higher relative fitness due to natural selection. A ratio of wild-type to vestigial flies was determined, and was set up in each environment. 10 wild-type to 40 vestigial flies was chosen, giving a total of 50 flies for each environment. Each week the flies were fed, and every two weeks they were counted to represent a new generation. At the end of the 13 week experiment, the last generation of flies were counted and recorded in a data table. The results of the experiment show that evolution was occurring in both cages, and that wild type flies were dominant regardless of the environment.…
Air enters through nostrils which contain coarse hairs. The pharynx is shared between the digestive and respiratory system and extends between the nostrils and the larynx. The larynx joins the pharynx to the trachea; it consists of cartilages and is also known as the voice box. The trachea divides to form the primary bronchi, the left and right bronchi which the bronchi are two tubes that carry air into the lungs and they .break down into smaller branches which are called bronchioles. At the end of these are air sacs called alveoli which absorb oxygen from the air. The diaphragm is a muscle which is directly below the lungs, during inhalation the diaphragm contracts to allow the chest cavity to expand as the lungs fill with air.…
3. Cells lining the trachea have whip-like motile extensions on their free surfaces. What are these extensions, what is their source, and what is their function?…
Passageway for air during breathing, produces sound, prevents food and other foreign objects from entering the breathing structures.…
to the right and left lung. After entering the lungs, the branches subdivide, finally emerging as…
2. Do you see any anatomical reason why the right lung has more lobes than the left lung - and is subsequently larger and heavier?…
insect, we still have to have a backbone in which we can actually add that gene towards. For…
Cited: Campbell, Neil A., Jane B. Reese, Martha R. Taylor, Eric J. Simon. Biology 105 Taken From; Biology: Concepts & Connections (Fifth Edition) Benjamin Cumming, San Francisco, CA, 2013.…
Drosophila melanogaster is a common fruit fly that has been useful for most experiments in the study of Genetics. The male and the female fruit fly are similar and different in regards to how they look, structurally. They are similar because both genders have a head, thorax, proboscis, antennae, eyes, and mouth parts. However, males are smaller than females and have about five abdominal segments as opposed to the seven that the female has. The life cycle of these fruit flies consist of egg, larvae, metamorphosis, and then adult stages. During the egg stage of their life cycle, the eggs are sunk into the food until they become larvae that spend all of their time eating. After, the larvae go through two molting phases called instars,…
The word Respiratory System sounded so cool to me so I had to ask, “What’s that?”…
Drosophila, or fruit flies, was chosen for the study of X-Linked traits for multiple reasons. Fruit flies are small insects approximately 3mm long, and thus use minimal space when compared to other species. The diet of fruit flies is simple and does not require extraneous foods or materials (Ullrey 2011). Additionally, the life cycle of fruit flies is quite short, lasting approximately 26 days for a female and approximately 33 days for a male (Ullrey 20111). Lifecycles of flies may be altered based on environment or certain genetic mutations. From egg to adult takes approximately 10 days at room temperature (25°C) (Ullrey 2011). The short life span of fruit flies makes them an ideal subject for the study of genetics, as multiple generations can be studied in a short period of time.…
Research on stem cells continues to advance knowledge about how an organism develops from a single cell and how healthy cell replace damaged cells in adult organisms.…
the bronchi(bronchus for singular), are air tubes that connect to the "lungs" and that branch into…