Honors Biology D Period Blog

Download link for lab: http://www.sendspace.com/file/f8bx2j

I recommend downloading the lab from that link so you get to see the pictures and the formatting is also better.

Text:

Investigation 7A: Leaf Structure and Stomates (p. 644)

Leaves have structural adaptations that enable them to perform their specific functions efficiently. In this investigation you will examine those structures and try to identify the functions for which they are adapted.

Materials:

Cover slip
Dropping pipet
Iris scissors
Microscope slide
Forceps
Compound microscope
Prepared slide of cross section of a leaf
Several types of fresh leaves
Variety of mature plants from the class

Part A: Leaf Structure and Function

Examine the various plants, the different types of leaves, and the arrangement of leaves on the stems of the classroom plants. Record your observations.
Examine a prepared cross section of a leaf under high power of your microscope. Compare your slide with figure 7.2 to become familiar with the various regions of the leaf. Consider its structure in relation to the functions of light absorption, water supply, and carbon dioxide absorption.
Locate chloroplasts in the leaf cells. Note their shape and abundance in the various leaf cells.
Locate a cross section of a small vein in the center tissues of the leaf. The vein is surrounded by a sheath (covering) of cells that also are photosynthetic. Notice some of the empty cells with thick walls in the upper part of the sectional leaf.
Examine the covering layers of the leaf – the upper epidermis and the lower epidermis. These single layers of cells are covered by the cuticle, which may have been removed when the slide was made.
Locate a stomate and its guard cells. Locate the spongy tissue just below the lower epidermis. Note how the stomates are located in relation to the spongy tissue.

Analysis:

What might be the advantage of a flat, thin leaf blade to the photosynthetic capacity of the plant?
How does the arrangement of leaves on a stem relate to the photosynthetic capacity of the plant?
On the basis of your observations of chloroplast locations in the leaf, which cells are the main photosynthetic cells?
How might the location of chloroplasts in these cells be advantageous to the plant?
Suggest a function for the thick-walled, empty cells in a leaf vein.
Explain how the cuticle may affect the efficiency of photosynthesis.
Compare the structure of the spongy tissue to that of the other leaf tissues.
Explain how the location of stomates in spongy tissue is related to the function of the spongy layer.
Write a short paragraph summarizing how the leaf structures you observed are adapted for leaf functions.

Part B: Number of Stomates

While holding the lower surface of a leaf upward, tear the leaf at an angle. The tearing action should peel off a portion of the lower epidermis. It will appear as a narrow, colorless zone extending beyond the green part of the leaf.
Lay the epidermis in a drop of water on a slide and use the scissors to cut of a small piece. Add a cover slip. Do not allow the epidermis to dry out. Caution: Scissors are sharp; handle with care.
Using the low-power objective of your microscope, locate some stomates. Then switch to the high-power objective. Make a sketch to show the shape of a stomata, its guard cells, and a few adjacent cells in the epidermis.
Count the number of stomates in the high-power field for 10 different areas of the epidermis. Record your observations.
In the same manner, count the stomates on the upper epidermis of the same leaf. Examine as many other types of leaves as possible. Compare the number of stomates per mm2 on the upper and lower surfaces of each type of leaf.
Wash your hands thoroughly before leaving the laboratory.

Analysis:

Calculate the average number of stomates per mm2 of the leaf’s surface. (Area of a circle. You need the diameter of your field of you to calculate the diameter)
How did the number of stomates per mm2 in different areas of the same side of a piece of leaf epidermis compare? On the opposite side?
Did the stomates vary in the amount they were open? How can you explain your findings?
What would you do to assure a reliable comparison of the number of stomates per mm2 for two species of plants?
What do your data suggest about the distribution of stomates in leaves of your species of plant? What assumption must you make in drawing this conclusion?

When's the test?

Here are the concepts to study for the test.

• Invention of microscope


• Unicellular vs. Multicellular


• Organelles - structure and function


• Active and Passive Transport


• Plant vs. Animal Cells


• Molecular polarity and size


• * 1 short answer question will be on cell membrane *

Well I have never done this so I dunno how this is gonna turn out... but you can see the four whiteboards that Mrs. Cebulski put up. The second picture, which is just a corner of the whiteboard, is the corner that is missing from the third picture's whiteboard. I'm pretty sure you can enlarge it by clicking on it, but I can't try from this edit box.

Here are the tables you can put your info in courtesy of Elbek. The invertebrates table needs a few extra columns.

Download it:

Vertebrates: http://www.sendspace.com/file/jn3vgd

Invertebrates: http://www.sendspace.com/file/rb8f59

There is a C&C

For Ch.6 Sections 1,2,3,4 ==C&C for p.161, and 173


and Ch.3 Sections 1,2 C&C P.80

I know labs are usually due day 7, but I heard we were getting more time to classify + Mrs. Cebulski said we had no homework over the weekend. So is it due Monday or extended?

http://spreadsheets.google.com/pub?key=pGGhs-NmdBpmsfh_JKBVsfw

here is just the plain graph. I head we get one more class day to work on classifying.

does anyone know when the review packet is due???

I think it is but i am not sure, anyway does anyone know if we need complete sentences for the answers?

Does anyone know if the study guide Mrs. Cebulski gave us in class today is due tomorrow?

I have a feeling that there will be more problems and questions about the online textbook later on, so I decided to add the link and code to the side bar right there >>>.

What are facts we are supposed to write for the aquatic biomes? I know that for the terrestrial biomes it is climate, flora + adapations, fauna + adaptations, soil composition, global/famous, limiting factors, and summary. 

We can bullet all boxes right? and what do we write for the summary

temperate oceans, tropical oceans, and vent ecosystems

Does anyone know for the biomes project what aquatic biome comes after shorelines?

I left my book at school and i can't find the code to access the book.



Can someone post it?

Here it is up for download

http://www.sendspace.com/file/mzwzsw

Good luck on the test everyone

So... what was the homework due tomorrow? Empty syllabus is making me nervous.

Can anyone else access the online student textbook? Mine doesn't show up and says "Unable to connect to MySQL server".

I've tried with Internet Explorer 7, Mozilla Firefox (latest), Opera 9.61, and Google Chrome (latest). All gave the same error.

edit: Never mind, it works now.

EDIT2: FINAL VERSION

All the data is in this version. 

ONLY DOWNLOAD THE FIRST OR SECOND LINK!

http://rapidshare.com/files/156960173/Germination_20Results.xls

mirror:

http://www.sendspace.com/file/3v2hel

Don't download the others, unless you want a peek at the work in progress.

By the way, the lab and analysis questions are on page 700-702.

old version 2

http://www.sendspace.com/file/eqozvc

Old Version:

http://www.sendspace.com/file/zm2o9h

The download link is below the ad (when you enter the page)

We couldn't get everyone's results so i made a google doc

http://spreadsheets.google.com/pub?key=pQo9HtYiOKFSWW79YTzZ-Pw

Click on the link and edit it if you want to add your data, its being edited as we speak.

Nobody has the data for the germination, and nobody emailed it to me so i don't know what to do. I know for B nobody got any germinations, but for A i don't know, i know a few groups had results. If you did have results for A please post your data. Hopefully if everyone sees this and posts their data we might be able to make a table.

http://www.runet.edu/~swoodwar/CLASSES/GEOG235/biomes/intro.html http://www.enchantedlearning.com/biomes
http://www.mbgnet.net/index.html
http://animaldiversity.ummz.umich.edu/site/teach/habitat_descriptions.html
http://www.gma.org/herring/biology/distribution/comparing_oceans.asp http://www.botos.com/marine/vents01.html#body_4
www.blueplanetbiomes.org

Hi Ali

I only have my powerpoint because for some reason i didn't get the email for the nitrogen cycle and the carbon cycle. If you made a powerpoint please email it to me at: btehrani08@gmail.com

Thanks



Water Cycle


Download it here: http://www.sendspace.com/file/lhq6ca

I couldn't make a Google doc so you have to download it there.

http://spreadsheets.google.com/pub?key=pGGhs-NmdBpmEnvwsgJaPfg

Above is the Google doc


Here is the link if you want to download it:

http://www.sendspace.com/file/09xcy5

Guys, does anyone know if we can use the whole table in our lab or just the averages or what.

http://spreadsheets.google.com/pub?key=pQo9HtYiOKFT3rjLdYKMZLA

thats the table with all the info



You can get the downloadable version here by entering the verification code (it tells you) and then pressing download.


Here is the downloadable option

http://www.sendspace.com/file/ap8ecv



and just in case that doesn't work then http://www.megaupload.com/?d=Y8R9FOOU try downloading from the first link first though.


Good luck with the lab, mail me, facebook message me, or call me with any questions.

What are the steps for the BSCS website to get to the textbook?

This template will probably be only temporary, the previous template lost its images because its bandwith on photobucket was exceeded. 

You should be able to find the "New Post" button on the top right corner if you are logged in.

I wasn't able to catch the homework for tonight. What was it?

Hey,
I can't seem to figure out how to log onto the noodlebib to site my sources. If anyone knows the username and password I could use it. Also for those that have the gauchers disease project, i haven't been able to find any information on the new experemental treatment. If you know any good sites please tell me.
Dylan K

Click Here to view!

The new syllabus has arrived, the test date is 10/10.


And a new link was added to the helpful links section, check it out.

I was just wondering if anyone with a mac was having trouble with using the online text book. Because when it opens all i can view is the cover page, none of the other pages work when i click on them.

Here is the rubric for the Bioethics case study


Click Here for Rubric

Jeah, I know its a little late, but what was the homework for the weekend?

how much do we write in each box of the flow chart and what exactly do we write.

Thanks Bijan!  Love the blog, Mrs. C

Hey, here is the information for the biology lab. I think you need to do the analysis questions by our next lab on day 7.

Google Docs link -google doc link

If the top link won't work for you, download from here by entering the verification code on this site then, wait 45 seconds, and press download. The other link will take you straight to the info though so its better.

Also I just added links to helpful sites to the right of the blog.

If anyone wants to help improve the blog's design post a comment saying so and I will grant you admin privileges.

My current goal: adding live chat to the site so people can chat about biology/labs/assignments, also to find a better template for the site.

Another update: I embedded a chatroom, changed the template

Important: Post through your dashboard, the new template has a few issues nothing major, it just makes it harder to post and edit. Jake and I will fix this tomorrow during our free.

Welcome to the honors d period biology blog. I'm not sure if everyone has permissions to post so if you want to post tell me your account name in a comment, and I will give you permissions. Please feel free to start posting and discussing.

UPDATE: I just sent invitations to everyone that had their email on the list (23 invites in total) so there is one person i need to get an email from. If you did not receive an invitation in your email just post a comment or email me at btehrani08@gmail.com