My Class Board...

9th Diversity in Living organisms 2

DIVERSITY_IN_LIVING_ORGANISMS...

 

Reposting - Flower Assignment details for 8th

8A - flower asignment

You have to go to the link. Understand the explanation and answer questions on the W/S based on that. WE will be doing flower dissection based on this understanding and a quiz will be conducted.This activity will be done on coming Wednesday- 9.1.2013

http://bcs.whfreeman.com/thelifewire/content/chp39/3902001.html


More help...
https://www.youtube.com/watch?v=L4Ig8J2b2Ag

https://www.youtube.com/watch?v=HuKa57OJ_iA

https://www.youtube.com/watch?v=oZyMVoOIYJY

Foe your help, one more time the groups and their flower:

Flower assignment - Groups and their respective flowers...

As discussed in the class following are your groups according to the roll no. for the above mentioned assignment. Every student in the group will get the flower.

1 - 6 : Hibiscus
7 - 12: Rajanigandha
14- 20 Spider Lilly
21 - 26: Tulip
27- 32: Orchid
33-38: Common Lilly (Pink)
39-44: Petunia or similar
45-48: Flower of your choice.(But with told criteria)

Evolution of feathers...

Babbonish feet...?

A recent study of visitors to the Boston Museum of Science has revealed that some humans - about 1 in 13 - have feet that are ape-like in their structure.

Our great-ape cousins such as chimpanzees have feet that are very flexible in their middle region due to something called the midtarsal break hat allows their feet to bend in the middle, enabling them to grasp at branches for easier climbing through trees. So when a chimp lifts his foot off the ground, it just flops about - there's nothing to hold the bones together. Most humans, on the other hand (or should I say foot?), have the same joint but have ligaments that stretch across it making the foot more rigid and stable for upright walking.Australopithecus sediba, a human ancestor that lived 2 million years ago, has a foot structure that is more ape-like than human, so somewhere along the line our feet evolved probably to accommodate our bipedalism.

The study was done by Jeremy DeSilva, a functional morphologist from Boston University, whose main interest is the evolution of the human foot and ankle. In this recent study, museum visitors were requested to walk barefoot across a mechanized carpet while DeSilva's team observed their gaits and the structure of their feet as they walked.

The surprising results showed that 8 percent of the nearly 400 participants possessed a flexible midtarsal break in their foot, and displayed a pressure signature in their footprint that looked like that found in the footprints of non-human primates. Perhaps more surprising is the fact that those subjects who had the unusual foot-joint structure weren't even aware of it until DeSilva revealed it to them.

The study was published in the American Journal of Physical Anthropology.

Triple Filter Test by Socrates...

Triple Filter- Everyone should analyze the validity of statements that others backbite about, words can portray good as bad and vice versa. But heart sees truth not words. If you go with words, you are prone to loose relationships, and unnecessarily misunderstand and hurt others. So think twice, before you come to a conclusion about anyone. Another thing, if someone comes near you and backbites about others, be sure that he will do the same about you, near others. It's not my word, it's a spanish proverb. 

In ancient Greece, Socrates was reputed to hold knowledge in high esteem.
One day one fellow met the great philosopher and said, "Do you know what I just heard about your friend?"

"Hold on a minute," Socrates replied. "Before telling me anything I'd like you to pass a little test. It's called the Triple Filter Test."

"Triple filter?"

"That's right," Socrates continued. "Before you talk to me about my friend, it might be a good idea to take a moment and filter what you're going to say. That's why I call it the triple filter test.

The first filter is Truth. Have you made absolutely sure that what you are about to tell me is true?"

"No," the man said, "actually I just heard about it and..."
"All right," said Socrates. "So you don't know if it's true or not. Now let's try the second filter, the filter of Goodness. Is what you are about to tell me about my friend something good?"

"No, on the contrary..."

"So," Socrates continued, "you want to tell me something bad about him, but you're not certain it's true. You may still pass the test though, because there's one filter left, the filter of Usefulness. Is what you want to tell me about my friend going to be useful to me?"

"No, not really."
"Well," concluded Socrates, "if what you want to tell me is neither true nor good nor even useful, why tell it to me at all?" This is why Socrates was a great philosopher and held in such high esteem.

Friends, use this triple filter each time you hear loose talk about any of your near and dear ones.

8 A Assembly - 2013-14

8 A Assembly 2013-14:Elixir of life

Control & Coordination

10th Bio - Control & coordination

In process Class boards for June...

Difference between Mitosis and Binary Fission

Difference between Mitosis and Binary Fission 

• Mitosis can only be seen among eukaryotes while binary fission occurs only in prokaryotes.

• Unlike the binary fission, mitosis can be considered as rather a complex process.

• Mitosis produces two genetically identical nuclei at the end, while binary fission will result in two separate, genetically identical cells.

• During mitosis, specialized structures such as mitotic spindle will be formed to assist in the process. But in binary fission no such structures are made.

• In mitosis, each DNA copy is attached to the mitotic spindle, but in binary fission copies of DNA is attached directly to the cell membrane.

• Mitosis involves only the division of the nuclei, whereas binary fission involves division of genetic material as well as the cytoplasm.

Cell models by 9th grade...

Cell models - 9th grade

10th - Life processes

9th - Carbon cycle, Water cycle - game

http://www.neok12.com/diagram/Carbon-Cycle-01.htm

http://www.neok12.com/diagram/Water-Cycle-01.htm

Tricks to remember Phylum's and Classes...

See the letters in bold they stand for phylum and class respectively...

They are in their  increasing order of complexity to help you remember things accordingly. for e.g. You can remember, upto which phylum animals are diploblastic, where does triploblastic start...

Phylum:
Po Can you PLease give NAAN to ME

NOTE: Since 'A' comes side by side it will replace each other while you are reading... So that all phylum's come in a proper sequence... So, 'AN( Annelida)' comes before 'A' (Arthropoda)'


Class
PARAM in my CLASS is a VERTEBRATE.

Some links for 10th Biology - Revsion

Though links are provided here... It is better that you rely on the NCERT textbook, W/S we have in the school and what teachers discuss in the class.

http://cbseportal.com/exam/class-x/biology/REV.-QUESTIONS-BIO-CLASS-X-HEREDITY-AND-EVOLUTION

http://extragrades.com/cbse/class-x/science/chapter-9-heredity-and-evolution/

http://cbse4.blogspot.in/2012/07/solved-assignment-heredity-and.html

http://www.kshitij-school.com/CBSE-Board/Important-questions/Class-X/Science/Heredity-and-Evolution-1.aspx

Why do we fall ill - Discussion on Symptom Vs Sign

Here are some more facts to help you differentiate between the two.

1. Signs are what a doctor sees, symptoms are what a patient experiences.
2. While signs are the physical manifestation of injury, illness or disease, symptoms can be described as what a patient experience about the injury, illness or disease.
3. Signs are objective. Symptoms on the other hand are subjective

You can go to the following links for more information:

http://wiki.answers.com/Q/What_is_the_difference_between_signs_and_symptoms
http://www.differencebetween.net/science/health/difference-between-signs-and-symptoms/
http://firstaid.about.com/od/symptoms/f/09_The_difference_between_signs_and_symptoms.html

Think before u pass any comments...

8th - Flower - Pollination, types, agents, fertilization

Check the earlier post about the link you need to use and other links there...

https://sites.google.com/site/classroomformystudents/my-forms (Our website- Roll down on the page after clicking)

http://formystudentsfromme.blogspot.in/2010/06/flower-parts.html (This blog -Parts of a flower)

https://www.youtube.com/watch?v=4YQ5q1cjEU4 (Introduction)
https://www.youtube.com/watch?v=eqsXc_aefKI  (TED)

https://www.youtube.com/watch?v=PKyC2GZd2dE

https://www.youtube.com/watch?v=FiwkJui2mh0 (pollination insects)

https://www.youtube.com/watch?v=AbpEhe6eXGI (fertilization – events inside ovary)

https://www.youtube.com/watch?v=0iK4Szjg4cg

9th - Natural resources

 

  NCERT Answers- https://sites.google.com/site/classroomformystudents/my-forms?pli=1

10th - Mgmt. of Natural resources

NCERT - Answers - https://sites.google.com/site/classroomformystudents/my-forms?pli=1

10th - Heredity and Evolution

  NCERT Answers- https://sites.google.com/site/classroomformystudents/my-forms?pli=1

 

8A - flower asignment

You have to go to the link. Understand the explanation and answer questions on the W/S based on that. WE will be doing flower dissection based on this understanding and a quiz will be conducted.This activity will be done on coming Wednesday- 9.1.2013

http://bcs.whfreeman.com/thelifewire/content/chp39/3902001.html


More help...
https://www.youtube.com/watch?v=L4Ig8J2b2Ag

https://www.youtube.com/watch?v=HuKa57OJ_iA

https://www.youtube.com/watch?v=oZyMVoOIYJY

Foe your help, one more time the groups and their flower:

Flower assignment - Groups and their respective flowers...

As discussed in the class following are your groups according to the roll no. for the above mentioned assignment. Every student in the group will get the flower.

1 - 6 : Hibiscus
7 - 12: Rajanigandha
14- 20 Spider Lilly
21 - 26: Tulip
27- 32: Orchid
33-38: Common Lilly (Pink)
39-44: Petunia or similar
45-48: Flower of your choice.(But with told criteria)