Wednesday, December 12, 2018

review for test tomorrow

Cell review What are five functions of the cell membrane? Why are organelles membrane bound? Which organelles and cell structures are common to all cells? Which are found only in plants? Which are found in plants, but not in animal cells? What would you find in bacteria that would help you to identify that it has to be a bacteria cell? What is the order of organelles that make up the endomembrane system useful for secreting substances from the cell? What type of transport is used in secreting substances from the cell? What type of transport would a bacteria use to eat a bacteria cell? What organelle does transcription occur in? What organelles do translation occur on? In the lab distilled water is pure and is definitely _____________ to the potato. This means the potato is _____________ to the pure water. Pure water would be considered to have a __________ water potential. The potato in pure water __________ mass. The point at which the line on the graph crosses the x-axis is called the ______________ point, where the solution concentration is _____________ to the cells of the potato. In a very sugary solution the potato is ______________ to the solution and therefore___________________ mass. The solution is H___________________ to the potato cell. Name three molecules that move by passive transport through the phospholipid part of the cell membrane. Glucose is large and P____________ and must go through a P________________. We call this F__________________ diffusion. Osmosis is the movement of _________________ across the cell membrane, form an area of ___________ water potential to _____________ water potential. This means water flows by passive transport form an area where there is more water to less water. It continues until the inside and the outside of the cell reach E__________________ . Active Transport includes any time you change the shape of the C__________ M__________, or the shape of a P_________________ such as the Na+/ K+ pump. Active transport uses _____________ to move molecules _______________ the gradient, or from an area of _____________ solutes to _____________ solutes.

Wednesday, November 28, 2018

reading and note taking on unit 2 chapter 5.1-5.4

reading and note taking on unit 2 chapter 5.1-5.4 read a section a night and take notes from now until Monday night.

Thursday, November 15, 2018

3-D Cell Project Make a 3-D model of the assigned cell (prokaryote-bacteria, eukaryote-animal, or eukaryote-plant). Use pictures of cells to get the proportions and shapes of the organelles correct. Have a section cut off of it so that we get a look inside. All appropriate organelles and membranes must be represented. Use pins and flags to ID the parts of use a key on the side. You will be graded on content, accuracy, grammar and artistic creativity. Make it colorful and artistic, make sure you can resolve the different structures. It should be about the size of a shoe about 11”-12” long, or about the size of a shoe box. Written portion: Make sure to define and /or describe the structure and the function of any of the structures that are found in your assigned cells. Include the terms: selectively permeable, cellular respiration, photosynthesis, bilipid, fluid, digestive, heredity, mitosis, protein synthesis, assembly, support, movement, secretion, convoluted, surface area, chemical reactions, specific chemicals that they use for structure and energy storage. Due after break

Wednesday, October 24, 2018

Khan academy take notes and try the quiz

https://www.khanacademy.org/science/high-school-biology/hs-molecular-genetics/hs-rna-and-protein-synthesis/v/rna-transcription-and-translation quiz yourself... 4 problems: https://www.khanacademy.org/science/high-school-biology/hs-molecular-genetics/hs-rna-and-protein-synthesis/e/hs-rna-and-protein-synthesis

Monday, October 22, 2018

Test tuesday and enzyme fill-in practice

Test on : The structure of DNA and how it is Complementary. Enzymes characteristics and regulation. Digestive enzymes and where they are found in the human body organs. Enzyme lab. Graphs and two types of questions. Test your knowledge of enzymes here Enzymes are important in chemical __________ . They make them go faster and produce a lot of product, especially for living organisms. Enzymes are a kind of ________ made up of a string of ________ acids. They vary in composition and number of these building blocks, so that they all have different and very specific shapes. Generally the shape is a __________ shape. The shape is important because of the other molecules that attach to it at the ________ ________. This is the place where the enzyme does its work. The __________ is/are the reactants in the chemical reaction. And form a __________-___________ complex when they come together. The substrate causes a small conformation change that helps in the chemical reaction. This is called the ____________ fit model for enzymes. The change is caused by the functional groups of the substrate interacting with the functional groups of amino acid ___ ________s or side chains. Enzymes can change their shape under various conditions. For example if it is too _______ or cold, too basic or too ______. This will result in the change of shape of the enzyme, otherwise known as de______ing the enzyme. This results in an enzyme that works slowly or -_____________________ . This is bad news for an organism, especially warm-_______ organisms like us. Our metabolism requires that our _______ be working at a high rate of speed to take apart molecules that are dangerous; or building molecules that we need. Building molecules is known as __________, a type of metabolism. Taking apart large complex molecules is known as C___________, or H________ because it requires water, and is part of our digestion process. Enzymes are very important in digestion. One dangerous product that sometimes form in organisms is Hydrogen peroxide- H2O2. We have peroxidases to get rid of them. These are enzymes and we know this because enzymes end with the letters ___. Our experiments showed that the enzymes are found in living things, we found ours in the ________, the storage tuber of a plant related to the tomato. These enzymes are found in abundance in our liver. Without them H2O2 could not be broken down into _____ and _______ . Our experiments also showed that enzymes do not work as well in cold / warm conditions, which would explain why things don’t grow as well in extremely cold weather.. The enzyme stops working when acids are added, you can tell because there is less _______ produced. Bases have the same effect on enzymes, in both cases the enzyme is ___________ so that the active site is changed and the substrates / products won’t fit any more. Cooking the potato changes the ________ in the potato so they can’t break down H2O2. Reaction rates most often are __________ at first, and then _________ towards the end because_______________________________. If there are more than one enzyme responsible to make a chemical or to completely break it down, then we call it a ___________ pathway. If one enzyme in the series is missing, nonfunctional or shut off then the whole pathway is shut off. If there is a ________ in the DNA that codes for any of the enzymes nonfunctional then there is no product made. If a product fits into the ___________ site of the enzyme , then it is called a competitive inhibitor. The greater the _________ of product the ___________ less product is made. This works as a ___________ feedback loop that is reversed by ___________________, then more substrate can be broken down. If a product fits on a site that is not the active site then it is an _________ inhibitor, or __________ inhibitor. When the product fits onto the other site it causes a ______________ change that changes the shape of the active site. Poisons often attach to an ______________ site and if they permanently attach they are called an ________________ inhibitor. _______________________ occurs when an enzyme has more than one allosteric site. An inhibitor causes all the sites to be ____________ , and an _________________ causes all the active sites to be open, giving a quicker response .

Wednesday, October 3, 2018

How do enzymes work?

check out the video and the info on enzymes and quiz in the student resources

Thursday, June 14, 2018

test on ecology friday

Biomes will not be covered. All other topics will be covered from the three powerpoints.

Tuesday, June 5, 2018

out Wednesday

On the AP biology blog finish reading material in Ecology part 3. Be prepared for a quiz thursday.

Wednesday, May 23, 2018

Wed 23rd alert for quiz

There will be a quiz the next time we meet on populations in ecology. including: density dependent factors; density independent factors; herbivory; predation, prey; pray; intra-specific competition; inter-specific competition; r-selected; k-selected; extinct ; extirpated; extant; realized (niche); fundamental (niche); commensalism; parasitism; mutualism; fecundity; mortality; specialist; generalist; competitive exclusion principle. also in the future prepare to answer this: The area adjacent to or in the Blackstone River has a unique community and set of conditions. Topic development: Describe the ecosystem with respect to 3 abiotic factors or range of conditions found there, and draw a labeled diagram of an existing food chain at least four trophic levels. Body (Three short paragraphs): Discuss or give evidence as to how factors can change populations: • A factor that could reduce the productivity of the river or its surroundings. • A factor that could increase or decrease the population of herbivores. • What is likely to happen if a keystone species is extirpated. Conclusion: Reasoning as to why biodiversity and populations are important to the health of an ecosystem.

Tuesday, April 10, 2018

Monday, April 9, 2018

vocab quiz tuesday

adaptive radiation, punctuated equilibrium, cradualism, coevolution, cladogram, derived characteristic, extant, extinct, microevolution, macroevolution, speciation, Matching definition to vacab word.

Tuesday, March 27, 2018

speciation stories the next time we meet.

We will go over the speciation stories the next time we meet, then the next day a review, then the test. Have a fictional story of speciation and the process done for tomorrow. It should be complete with before and after pictures and an explanation of the process. there will be a test by Monday or Tuesday. Thanks, Mr. Worden

Thursday, March 8, 2018

class work for Friday take this quiz about the mouse movie from the homework

mouse movie quiz You can use your ipad to go back and look at the movie. You may work with a partner to solve the problems. you may use your text or online sources. If true then write T, if False then write false and what the truth is! 1. T or F individual brown mice that move onto the black lava turn black so they are camouflaged. 2. T or F Researchers found that all the mice collected at the lava flow were black. 3. T or F Mice that were brown prefered to be on the desert sand instead of the lava flow so they would not be seen. 4. T or F the differential reproductive success of black mice was due to black mice refusing to mate with brown mice. 5. T or F In this case if black mice make up most of the population on the lava, this indicates that the inheritance pattern must be black is dominant and brown is recessive. 6. T or F A nearby population of the same species of mice living on the desert sand are mostly brown. this means the brown allele be dominant and the black is recessive. 7. T or F If black mice on the lava have a 10% Differential reproductive success, then it would take a million years for 90% of the population to be black. 8. T or F the Natural selection for black fur on mice affected the color of the top of the mouse, but not the change of color in the bottom of the mouse. 9. T or F a mutation in a gene causes the change from brown fur to black fur 10. T or F In other parts of the state where there is lava they found that mice changed color by rubbing up against the lava to become darker choose 11. If there are many shades of brown and many shades of black, then this trait is probably... Sex-linked / polygenic 12. If all the predators were exterminated then the population that is mostly black would... Stay the same/ turn back to mostly brown 13. If black is recessive, and six black mice are brought to an island with no other mice, then the only way to make a brown mouse is by... random fertilization/ mutation 14, Dr Saft is a(n)... evolutionary biologist narrating the movie/and acronym for natural selection 15. Mutiacorf is a way to remember... how natural selection affects populations/ways of variation in the offspring

Tuesday, March 6, 2018

HW for today and tomorrow

Read c 15 and c16 do ?'s on 391 and 413 view video on pocket mice and finches http://www.hhmi.org/biointeractive/making-fittest-natural-selection-and-adaptation http://www.hhmi.org/biointeractive/origin-species-beak-finch

Wednesday, February 14, 2018

Test tomorrow in D block

The test will include all the genetics vocabulary,mendel's 3 laws, punnet squares, monohybrid crosses, dihybrid cross phenotypic ratio only. No Chi square analysis! patterns of inheritance both dom/rec and inc' dominance, codominance, sex-linked and polygenic inheritance patterns. Probability using the multiplication rule and the addition rule. Nothing on meiosis.

Wednesday, January 24, 2018

mendelian genetics 'the biology project'

got to mendelian genetics 'the biology project' and do the unit online about mendelian genetics. There are tutorials and problem sets, and vocabulary that you need to know for this unit. http://www.biology.arizona.edu/mendelian_genetics/mendelian_genetics.html