BIO II. INTRODUCTION TO GENERAL BIOLOGY iii. National Open University of BIO General Biology II is a one-semester, 2 credit- hour course in. BIO Biological Sciences II. Course Description. This course is a study of the classification of organisms and structural and functional considerations of all. BIO General Biology II (3 Units: LH 45). A generalized survey of the animal kingdom based mainly on study of similarities and differences in the external.
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Download this BIOL class note to get exam ready in less time! Class note uploaded on Jan 18, 2 Page(s). نتيجة بحث الصور عن human biology . Human Biology. Bio lab pdf. zip. (k). Abeer Alsadoun,. 23 /01 / ص. v.1 · ď. Comments. View BIO ciofreedopadkin.cf from BIO at Georgia Military College, Fairburn. NATIONAL OPEN UNIVERSITY OF NIGERIA SCHOOL OF SCIENCE AND.
Chapter 1 Themes Organisms Interact with other Organisms and the Physical Environment In an ecosystem, each organism interacts continuously with its environment. This includes both other organisms and also, physical factors.
Humans also interact with our environment, unfortunately these interaction sometimes have drastic consequences. Burning of fossil fuels releases gaseous compounds into the atmosphere.
All organisms must perform work which requires energy. Energy from sunlight is converted to chemical energy by producers, which is then passed on to consumers. The Cell is an Organisms Basic Unit of Structure and Function The cell is the lowest level of organization that can perform all of the properties of life.
Cells are either prokaryotic or eukaryotic. Eukaryotic cells contain membrane bound organelles including a DNA containing nucleus.
Prokaryotic cells do not contain membrane bound organelles. Genetic in formation is encoded in the form of DNA. This transmits heritable information from parents to offspring.
DNA sequences program a cells protein production by being transcribed into RNA and then translated into specific protein, a process called gene expression. Gene expression also results in RNAs that are not translated into a specific protein but serve other important functions. These are examples of traits that are controlled by many genes as well as environmental influences.
What are polygenic traits? What are multifactorial traits?
Give an example of each. Polygenic traits are traits that are controlled by more than one gene. Pure polygenic traits are rare because most traits are at least partially controlled by environmental influences.
BIO 102 COLLEGE BIOLOGY II
An example of an almost purely polygenic trait is eye color. Multifactorial traits are traits that are controlled by both genes and environmental influences. Some common polygenic multifactorial traits are height, skin color, hair color, body weight, many illnesses including cancer , behavioral traits and tendencies. Polygenic traits may produce varying phenotypes due to the combination of the expressed genes.
Therefore, individuals within a population will vary in the expression of polygenic traits ex: eye color, height, weight, etc.
Some genes may also be more influential than others in controlling the overall phenotypic expression. Polygenic versus single gene traits: which are quantitative and which are qualitative? Conversely, polygenic traits are quantitative — they fall along a continuum. Genes largely control the number of ridges in a fingerprint pattern; however, the environment can also play a role, particularly during weeks 6 through 13 of fetal development. During this time, contact of the fingers or toes with the walls of the amniotic sac can alter the ridge pattern so that even identical twins who share the same genes may not have identical fingerprint patterns.
What factors affect height?
If all humans have the same number of melanocytes per unit area, then why do we have different skin color hues? Melanocytes are structures that contain the colored pigment melanin within melanosomes.
Although all humans have about the same amount of melanocytes per unit skin area, these melanocytes can differ in the number, size and density of distribution of melanosomes, which will influence skin color.
Why is skin color not a reliable indicator of ancestry? Skin color is just one trait among many that can vary among populations of humans. Race based prescribing is when a drug or treatment is targeted for a certain group based on their skin color. Although certain illnesses and disorders can be more prevalent in one group of humans due to the tendency to choose partners within the group, access to a certain treatment should not be restricted to individuals with a specific skin color.
In this case, some individuals may not get the treatment they need or some may be prescribed something they do not necessarily need; this is a very superficial means of prescribing treatment. What is empiric risk and how is it determined?
BIO 102 Human Ecology
What is the difference between incidence and prevalence?Multifactorial traits are traits that are controlled by both genes and environmental influences. Used with permission. DeVry University, Chicago. I cannot even describe how much Course Hero helped me this summer. This highly regarded recommendation means that your Ed4Credit classes will be considered for credit at almost 2, colleges and universities across the United States.
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