Presentation on theme: "Using Lab Manual pages 60-62, please answer the following:"— Presentation transcript:
1Using Lab Manual pages 60-62, please answer the following: 5/5/10 DAILY DISCUSSION QUESTIONS Complete SentencesCollege Board Objectives: Biotechnology, RNAi, Lampreys and PlantsUsing Lab Manual pages 60-62, please answer the following:1. Please explain how restriction endonucleases are named2. Please compare and contrast staggered cuts and blunt cuts by restriction enzymes3. Please explain gel electrophoresis4. Is DNA positively or negatively charged?5. Please explain the purpose of a “DNA marker”DNA Fingerprinting Video ClipMOODLES- THE END IS NEAR :) COMPLETE THEM BEFORE MONDAY, MAY 10TH!! THEY ARE DESIGNED TO HELP YOU WITH QUESTIONS ON THESE CONCEPTS FOR THE AP EXAMPREPARE for the AP Exam! Save yourself time and money!Read your AP Cliff Notes every day/night for 15 minutes from now until the test.
2Cell Differentiation, Specialization and Multicellularity Why is a liver cell a liver cell if it has all the instructions to become any type of cell?Ectoderm?, Endoderm? Mesoderm?Cow- Topics 12 and 13 (Development in Multicellular Organisms-Cell Development in Organisms; Processes in Development)
3Recap DNA to RNA to protein Eukaryotes have introns which are intervening sequences and are not expressed. But, we have alternative intron splicing...sometimes an intron...sometimes not...Introns are not necessarily junk DNA. Research is booming in this area....still lots to learnExons are expressed...but sometimes, what is an exon may be an intron later.Alternative splicing part of the reason we only have ,000 genes and not more!RNAi is a relatively new discovery- let's find out what it is RNAi RNAi and medicineWhat is RNAi
4Critter of the WeekPhylum Chordata Superclass Agnatha- the jawless fishes (like hagfish)Class Cephalaspidomorphi- LampreysAbout 35 species – marine and freshwater. Predator and ParasiteSea Lamprey feeds by clamping its round mouth onto the flank of a live fish and using a rasping tongue to penetrate the skin of its prey and ingesting its blood.Live for years as larvae in freshwater streams and then migrate to the sea or lakes as they mature into adults.The larva are suspension feeder that look like lancelets. Some species feed only as larvae Lamprey-short clip
5PLANTSHypothetical ancestor- aquatic green algae protist. Charophyceans are the green algae most closely related to plantsAdaptations necessary for transition from water to land to prevent dessication:1. In most plants the dominant generation is a diploid sporophyte. Being diploid allows the organism to be more likely to survive genetic damage due to ultraviolet radiation (recessive mutations masked)2. All plants have a cuticle, which is a waxy covering on their aerial parts3. Development of a vascular system-so all the plant cells don't have to be in close contact with water. Vascular tissue = xylem and phloem
6PLANTS4. Sperm packaged as pollen for delivery by wind or animals (in advanced divisions)5. Gametophytes packaged in ovary in the most advanced plant division (Division Anthophyta)6. Plants of advanced divisions such as Coniferophyta and Anthophyta have adaptations to seasonal variations in the availability of water and light. Deciduous tress shed their leaves to minimize water loss during slow growing (dormant) seasons. Desert annuals will germinate, grow, flower and produce seeds within brief growing periods in response to a spring rain.
7PLANTSSix plant divisions- each division shows an increasingly greater adaptation to survival on land:I. Seedless Avascular Plantsa. Bryophyta Mosses-Bryophytesb. Lycophytac. SphenophytaII. Seedless Vascular Plantsa . Pterophyta FernsIII. Naked Seed Vasculara. ConiferophytaIII. Seed Vascular Anthophyta
8Alternation of Generations and the Plant Life Cycle The sporophyteMakes sporesWhich makesThe gametophyteGametesWhich makes theSporophyteWhich makes sporesGametes whichMakes theSporophyte and on and on
9PLANTSTake a moment to look in your textbook pages 585-and on, as well as LM pages 77a-77c, and write a brief description of each division on bulletin board paper. One paper per group everyone in the group must help and work on each division.THE BRYOPHYTES ARE here....take the time to look at the mosses under the micrscope and see if you can find the sporophyte.***make sure you've turned your bacterial transformation packet with all questions answered and any other past due work- DNA color packet, etc.
10Daily Conclusion Please describe bacterial transformation Please describe PCRExplain RNAiWhat is alternate intron splicing?Please describe the bryophytes