. ، plate و elegan…

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نوع زبان: انگلیسی حجم: 6.98 مگا بایت
نوع فایل: اسلاید پاورپوینت تعداد اسلایدها: 43 صفحه
سطح مطلب: نامشخص پسوند فایل: ppt
گروه موضوعی: زمان استخراج مطلب: 2019/05/15 09:19:27

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عبارات مهم استفاده شده در این مطلب

عبارات مهم استفاده شده در این مطلب

., worm, plate, c., elegan, stage, food, life, animal, lesson, egg, adult,

توجه: این مطلب در تاریخ 2019/05/15 09:19:27 به صورت خودکار از فضای وب آشکار توسط موتور جستجوی پاورپوینت جمع آوری شده است و در صورت اعلام عدم رضایت تهیه کننده ی آن، طبق قوانین سایت از روی وب گاه حذف خواهد شد. این مطلب از وب سایت زیر استخراج شده است و مسئولیت انتشار آن با منبع اصلی است.

https://gsoutreach.gs.washington.edu/files/gem_worm_ppt914_web.ppt

در صورتی که محتوای فایل ارائه شده با عنوان مطلب سازگار نبود یا مطلب مذکور خلاف قوانین کشور بود لطفا در بخش دیدگاه (در پایین صفحه) به ما اطلاع دهید تا بعد از بررسی در کوتاه ترین زمان نسبت به حدف با اصلاح آن اقدام نماییم. جهت جستجوی پاورپوینت های بیشتر بر روی اینجا کلیک کنید.

عبارات پرتکرار و مهم در این اسلاید عبارتند از: ., worm, plate, c., elegan, stage, food, life, animal, lesson, egg, adult,

مشاهده محتوای متنیِ این اسلاید ppt

مشاهده محتوای متنیِ این اسلاید ppt

lesson one what can we learn from worms how the nematode c. elegans maintains balance in a changing environment. reprinted with permission from z. altun c. crocker wormatlas.org c. elegans as a model organism what are model organisms there are many types of models—plants animals microbes—which are living systems used to study biological processes. many biological processes are nearly the same in all living things. why study c. elegans they are small transparent reproduce quickly and are relatively inexpensive to house. they are very well studied so there is already a wide body of knowledge about them. although simple looking they have complex organ systems digestive excretory reproductive nervous etc. that have processes similar to those of humans. a lesson about animal models titled why use animals in research can be found on the nwabr.org website at https www.nwabr.org teacher center animals research lessons all pictures available for use as credited fruit fly wikimedia commons mr. checker ۲ ۹ yeast wikimedia commons masur ۲ ۹ frog and mice understanding animal research copyright ۲ ۷ zebrafish wikimedia commons ۲ ۷ c. elegans centers for disease control and prevention dr. mae melvin ۱۹۷۴ bacteria centers for disease control and prevention pete seidel ۲ ۱ lesson one what can we learn from worms worm basics are the most abundant multi cellular organisms in the world estimated at one to ten million different species live in soil or as parasites in plants animals or insects c. elegans range in length from .۲۵ to ۱.۲ mm have two sexes hermaphrodite ۹۵۹ cells and male ۱ ۳۱ cells in the lab feed on bacteria such as e. coli growing on agar plates nematodes graphic reprinted with permission from z. altun c. crocker wormatlas.org orientation to the worm plate the dark region of food in the center of the plate may or may not be visible to students depending on how long ago the worms were transferred to the plate and how much food has already been eaten. explain to students that this is where the food originally was which might account for the location of many of the worms. life stages what will you see photo credit j. sulston. used with permission. c. elegans life stages john sulston university of manchester. dr. salston worked with sydney brenner and made this photo montage in the ۱۹۷ s. salston and brenner won a nobel prize in ۲ ۳ for their work with c. elegans. how long from egg to adult ۵۵ hours ۲ days ۷ hours worm rules wear gloves when handling the worm plates and wash your hands after removing gloves. store the plates with the agar side facing down so that condensation doesn’t drop onto the plate. flip the plate over to look at it under the microscope. you may need to remove the clear cover to see them well but only leave the cover off for a few minutes. do not leave the worms on the microscope in the light for more than a few minutes as they can get too hot. although c. elegans and the bacteria used as worm food are harmless to humans it is a good safety practice to always wear gloves when handling biological samples. in addition you may contaminate the plates by transferring worms bacteria or fungi from a different plate or the environment. tips for observing worms some things to look for what life stages are present adult larvae or egg where are worms on the plate on agar on food near edge of plate what are the worms doing moving not moving feeding watch these videos showing… eggs larvae and adults http www.youtube.com watch v tolygb bxqm feature player detailpage worms responding to touch https www.youtube.com watch v olrkwpcqvce another good video resource can be found here http www.openworm.org getting started.html what students should be able to distinguish adults and larvae. they may also have eggs on their plates. where they should look on the food the agar and around the edges. what the worms may or may not be moving. if they are on the food they may move very little because they’re eating. if they are straight and not moving at all they may be dead. drawing what you see and drawing to scale place a worm plate on the stage of the scope agar side down. take off the lid. at a low magnification find where the worms are located on the plate. at high magnification find a place on the plate that has worms of different sizes. place the ۴ mm x ۴ mm grid under the worm plate beneath the worms you are looking at so you can see both the worms and the grid. draw what you see in the grid on the microscope on the ۸ cm x ۸ cm grid in student lab sheet ۱. each mm in size on the microscope is ۲ cm in the drawing. discussion wows and wonders lesson one did you see all the life stages on your plate how are the wild and mutant worms similar or different what evidence indicates that the worms react to their environment students may not notice any differences between the wild and mutant worms or the differences they see may be due to differences in the age of the worms on each plate. lesson two worms in a changing environment more worm basics nematodes reach sexual maturity at ۳ days live up to ۳ weeks have two sexes – hermaphrodites xx and males xo xx can self fertilize or mate with males but not each other produce over ۳ offspring in a lifetime have ۳ distinct life stages egg → larvae l۱ l۲ l۳ l۴ → adults life stage guide photo credit j. sulston. used with permission. c. elegans life stages john sulston university of manchester. dr. salston worked with sydney brenner and made this photo montage in the ۱۹۷ s. …

کلمات کلیدی پرکاربرد در این اسلاید پاورپوینت: ., worm, plate, c., elegan, stage, food, life, animal, lesson, egg, adult,

این فایل پاورپوینت شامل 43 اسلاید و به زبان انگلیسی و حجم آن 6.98 مگا بایت است. نوع قالب فایل ppt بوده که با این لینک قابل دانلود است. این مطلب برگرفته از سایت زیر است و مسئولیت انتشار آن با منبع اصلی می باشد که در تاریخ 2019/05/15 09:19:27 استخراج شده است.

https://gsoutreach.gs.washington.edu/files/gem_worm_ppt914_web.ppt

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