Skin color is a really good example of polygenic inheritance. Polygenic inheritance deals with multiple genes for a single trait. The many genes explains why there is a wide variation between phenotypes and there are many different skin colors.( Armstrong, W.P. 2001) Another example of polygenic inheritance in humans is height and eye color.
Armstrong, W.P. 2001. "Multiple gene (polygenic) inheritance." Waynes World. 9 May 2001. http://waynesword.palomar.edu/lmexer5.htm
AP Bio
Tuesday
Imbibition
Imbibition is basically the absorbtion of water by a hydrophillic surface and it may cause swelling. For example, if you put seeds in water, they swell because of imbibition of water by proteins and cellulose.
Biology-Online.org, (n.d.). Imbibition. Biology online. Retrieved from http://www.biology-online.org/dictionary/Imbibition
Herbivores, Omnivores, and Carnivores
Herbivores, Omnivoes, carnivores...what's the difference? Herbivores are animals that get energy from eating plants. They need a lot of energy, which is why herbivores like cows, eat all day long. An omnivore is an animal that eats either other animals or plants. Some hunt their food like a carnivore and eat other animals, and others are scavengers. Humans are an example of omnivores. A carnivore gets its food from killing and eating other animals.
http://www.qrg.northwestern.edu/projects/marssim/simhtml/info/whats-a-herbivore.htm
Cnidarian
Jellyfish, anemones, and corals, are some examples of animals that belong to the phylum Cnidarian. They are all radially symmetrical, which means their body extends out like a bicycle spoke. A perfect example of this is a starfish. All cnidarians have tentacles with stinging cells so that they can catch prey for food.
Oceanic Research Group, Inc., (2007, July). Cnidarians: simple animals with a sting!. Retrieved from http://www.oceanicresearch.org/about/contact_org.htm
Homologous Structures
If you ever looked at a horse leg, dog leg, and legs of other animals, notice they look very similiar, but not the same. They are referred to as homologies. Homologous structures are structures that have a similar origin, but are not quite the same.
More adaptations [Web log message]. (2008, March 21). Retrieved from http://lazearscience.blogspot.com/2008/03/more-adaptations.html
Invertebrate
An invertebrate is an animal without a backbone. Invertebrates make up a big part of species on Earth, over 97% are invertebrates. Some examples of them are star fish, snails, spiders, and worms.
Parker, Steve. 1989. Seashore: Eyewitness Books.
Parker, Steve. 1989. Seashore: Eyewitness Books.
Model Organism
Model organisms are a certain species that are studied by scienctists to discover biological things. They are used mainly because they are easy to breed in a lab setting and have certain experimental advantages. A model system is a simpler, idealized system that can be accessible and easily manipulated (Rosenblueth & Wiener, 1945). An example of a model organism that is used in school to study is a worm.
Rosenblueth, A., & Wiener, N. (1945). The role of models in science. Philosophy of Science, 316-321
Rosenblueth, A., & Wiener, N. (1945). The role of models in science. Philosophy of Science, 316-321
Sunday
MONOCOT vs DICOT
People just tend to look at flowers, as flowers. But they are categorized into dicots and monocots. Each group has distinct features .For example, Flowers of monocots have the parts in threes or groups of three. For example, a monocot flower may have three sepals, three petals, six stamens, and a pistil with three chambers. Flowers of dicots have the parts in fours or fives, or multiples of four or five. Leaves of monocots generally have parallel venation whereas leaves of dicots generally have netted venation.(Braselton, J. P. (2006). )The flower to the left is a dicot and the flower to the right is a monocot.
Braselton, J. P. (2006). The flowering plants. Retrieved from http://www.ohio.edu/people/braselto/readings/angiosperms.html
AUTOTROPHS and HETEROTROPHS
Based on how organisms get their energy, they are divied into two groups: autotrophs and heterotrophs. First of all, Autotrophs are very important and without them a lot of species would die. They are able to make organic molecules from inorganic material by using the energy of the sun. Plants are a perfect example of this when they use photosynthesis. Organisms that get their food from other organism are called heterotrophs. An example of this is shown in my picture: a buny(heterotroph) getting its energy from a flower(autotroph) that gets its energy from the sun. (Nave, 1985)
Nave, R. (1985). Autotrophs and heterotrophs. Retrieved from http://hyperphysics.phy-astr.gsu.edu/hbase/biology/autotroph.html
LIPID
Many people associate fast food and fats together. Some think of lipids having to do with just fat, but, there are many lipids in the body that include fats, oils and waxes, and more. The main job of lipids is to store energy, and our bodies use fat to do this. So we do need fats in our bodies and our diets. (Carter, 1996)
Carter, J.S. (1996). Lipids. Retrieved from http://biology.clc.uc.edu/courses/bio104/lipids.htm
TRAIT
Notice not one person looks exactly the same, everyone is unique. Why? Because everyone has something called “traits”. A trait is a specific characteristic of someone, whether it be their hair, eye color, blood type, ect. A trait is also the same as phenotypes, physical traits, and genotypes. Traits are something that are genetically inherited from your parents. (Krasnewich) If a guy has brown eyes(dominant) and his wife has blue eyes(recessive), their child is most likely going to have brown eyes because that is the dominant trait.
Krasnewich, D. (n.d.). Trait. Retrieved from http://www.genome.gov/glossary/index.cfm?id=196&textonly=true
FUNGI
Ever see mushrooms just growing wild in the ground like this one? Did you know that they are part of the Animal Kingdom Fungi. Organisms in this kingdom have many different roles depending on the fungi. Some break down dead organic material for example; others can be used for food, like mushrooms on a pizza. Fungi can be good and bad for human health. They are used for drugs like antibiotic in medicines, and they can cause diseases like ringworm and athletes’ foot. (Waggoner, 2006)
Waggoner, B. (2006). Introduction to the fungi. Retrieved from http://www.ucmp.berkeley.edu/fungi/fungi.html
ENZYME
Chemical reactions inside of our bodies are made possible by little proteins called enzymes and enzymes help speed up reactions. Breaking down food so our body can use it is an example of one of the jobs they do. (Dugdale, 2011) On an enzyme, there is a thing called an active site, which has a certain shape that goes together with a certain substrate (McGraw-Hill Higher Education, 2006), and they fit together perfectly like a puzzle piece.
Dugdale, D. (2011). Enzyme. Medline plus. Retrieved August 30, 2011, from http://www.nlm.nih.gov/medlineplus/ency/article/002353.htm
McGraw-Hill Higher Education, (2006). How Enzymes Work [Web]. Available from http://highered.mcgraw-hill.com/sites/0072495855/student_view0/chapter2/animation__how_enzymes_work.html
CARBON
Carbon is one of the elements on the periodic table and is the most abundant in nature. Carbon is all around us, in the sky, the sun, oceans, and also in us as well, we breathe out carbon dioxide. It comes in three different forms: amorphous, graphite, and diamond. Graphite is one of the softest materials, and its commonly used in something we use in school all the time which in pencils. (Winter)
BASE
If something is a base it is characterized by a slippery feel and changes litmus blue. Bases also release OH- in solution. Just like the concept of making something less acidic by adding a base, you can do the same to a base by adding an acid to it. When you combine a base and an acid (neutralization) , they will always make water and salt. On a pH scale, something is considered a base if it has a pH between 8 and 14, is it a base. Many household items are bases, like egg whites, baking soda, and cleaning products such as ammonia which I chose for my picture. (Carpi, 2003)
Carpi, A. (2003). Acids and Bases. Retrieved from http://www.visionlearning.com/library/module_viewer.php?mid=58
ACID
We all know that many foods such as vinegar, lemon juice, and more all have something in common, which is a sour taste. Ever wonder why? The reason is because they are all acids. The sour taste is one of the characteristics that classify something as an acid. Acids are also corrosive to metals, turn litmus paper red, and they release H+. On a pH scale, something with a pH between 0 and 6 is considered to be an acid. The lower the pH, the more acidic something is. To make an acid less acidic, you combine it with a base. The picture I chose is of a lemon. Lemon juice is very acidic and has a pH of 2. (Carpi, 2003)
Carpi, A. (2003). Acids and Bases. Retrieved from http://www.visionlearning.com/library/module_viewer.php?mid=58
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