Biology Essays, Research Papers & Term Papers (2,175) essays
- Charles Darwin (53)
- Human Biology (418)
- Plant Biology (150)
Biology essays:
Ritmos Biológicos y Sueño / Vigilia
... de los Relojes Circadianos Los relojes circadianos se heredan y son independientes a las temperaturas. Son resistentes a muchas sustancias químicas que afectan al Sistema Nervioso. Los ritmos circadianos tienen su sede en el encéfalo. En 1972 dos grupos de investigación ...
A Study of Diabetes Mellitus
... from a variety of factors that can vary from person to person. Examples of these factors are heredity, being overweight, and problems with beta cells, which are located in the pancreas. Diabetes can result in blurred vision, retinopathy, nerve problems, dry skin ...
"Respiration is very similar to burning." Is this true? Illustrate your answer by describing 3 similarities and 3 differences between the two.
... oxygen (in form of O2) to form oxide. However, burning can take place in other gases such as chlorine. Also both of these reactions are exothermic - both reactions release heat after reacting with oxygen. Another similarity is that both reactions release energy after oxidation ...
Effects of Salted Liver on Planaria (Zoology Experiment)
... to the middle of the petri dish. Figure 1 illustrates the initial setup for the control experiment. Figure 1: Setup of control experiment. After a response was recorded, the planarian was removed from ...
Study notes on the basic animal behaviors and the processes involved with these behaviors
... to identify members of the opposite sex of their own species -Allows females to pick genetically fit males to produce better offspring -Can be the song of a hummingbird, the chemical phermones releases by a moth, or the plumage of peacocks -Allows for individuals of a species to ...
Scientific Creationism
... to Hebrews 11:1 it states that "Now faith is the substance of things hoped for, the evidence of things not seen." In Genesis 2 we are given details of the whole creation process. In Genesis 2:7 it states that Adam was created from the dust of ...
Develop some hypotheses explaining why only eukaryotic cells have evolved into multi-cellular organisms.
... to avoid cellular damage due to this element. The purple bacteria evolved oxygen respiration by reversing the flow of molecules through their carbon fixing pathways and modifying their electron transport chains. Purple bacteria also enabled the eukaryotic lineage to become aerobic. Eukaryotic cells ...
Biotechnological Processes
... , 293) . Before the production somatropin, somatotropin was extracted from the pituitary of cadavers, a procedure that risks the spread of infectious diseases, such as Creutzfeldt-Jakob disease (Di Giuseppe, et al, 293). Somatropin is used to treat growth deficiencies caused by genetic mutations or ...
James Watson, Francis Crick, Maurice Wilkins and Rosalind Franklin
... to the United States to work on the Manhattan Project. Like many other nuclear physicists he became disillusioned with his subject when it was applied to the creation of the atomic bomb; he turned instead to ...
Developing new countries
... states that Epidemiologic transition is a shift from high death rates to low death rates in a population as a result of modern medical and sanitary development. Which is in the developed of countries birthrates have declined from a high of 40 percent to 50 percent per thousand to ...