MITOSIS in BM(klik sini)

Dolly - the cloned spesies(klik for more notes)

Anda jelas tentang reaksi menguap?

Menguap dengan mulut terbuka lebar di tengah suasana formal memang rasanya kurang sopan. Selain tanda-tanda kelelahan, bosan atau mengantuk, sebenarnya menguap mempunyai manfaat positif bagi kesihatan manusia.

Seorang saintis di bidang sistem saraf(neuroscientis), Andrew Newberg, Pengarah The Centre for Spirituality and the Mind dari University of Pennsylvania, mengatakan, menguap merupakan salah satu rahasia kesihatan.

"Kalau anda ingin punyai otak yang sihat, sangat penting untuk menguap," katanya.

Menguap, menurut Newberg akan menstimulasikan irama saraf di bahagian tertentu di otak dan mengatur suhu otak dan metabolisme badan. Seluruh fungsi ini akan meningkatkan kawalan otot-otot
badan bahkan menghilangkan 'jet lag'.
Oleh sebab itu, dia menyarankan agar kita
menguap setidak-tidaknya 10 kali setiap hari.

Selain memberi impak positif bagi otak, menguap juga boleh menjadikan tubuh badan jadi lebih rileks.

"Menguap lebih efektif dari meditasi untuk meningkatkan fungsi kongnitif," kata Newberg.

Penelitian juga menunjukkan menguap akan merangsang bahagian otak yang berfungsi pada rasa empati dan kepedulian sosial.

Menguap juga membantu mengatur jam biologi tubuh. Saat kita sedang lelah, menguap merupakan isyarat agar kita segera beristirehat atau tidur.

Editor : Hertanto
Sumber : Natural Solution, Indonesia
Disunting : Pn Norhaslina Hassan

MITOSIS & Binary Fission(read more, klik here)

Mitosis is the scientific term for nuclear cell division, where the nucleus of the cell divides, resulting in two sets of identical chromosomes. Mitosis is accompanied by cytokinesis in which the end result is two completely separate cells called daughter cells. There are four phases of mitosis: prophase, metaphase, anaphase and telophase.



Binary fission is a form of asexual reproduction which is used by all prokaryotic organisms, and some eukaryotic organisms like fungi as well. In addition to being used to duplicate whole organisms, binary fission is also utilized within the cells of eukaryotic organisms by some of the organelles. In this process, two daughter cells are produced by a single parent cell which effectively clones itself. The Escherichia coli bacterium has been used extensively by researchers studying binary fission, as it provides a classic example of this asexual reproduction method in action, and it is very abundant.

What is BUD?

Scientific Writing(klik here)

Discussion Mid Year Paper...

Tips in writing scientific sentences : check here...
http://classweb.gmu.edu/biologyresources/writingguide/PracticalTips.htm

Magrove swamp trees adaptations(klik)

*as Question 9, Mid Year f5

Tissue Culture Protocol(klik here)

If the bile duct(pundi hempedu) fails to function (klik)

*as question no 2 b ii), Mid Year form 5

How the grasshopper's leg work(klik here)

*as question 4, Mid Year paper(form 5)

Variasi warna daun....

*something to be studied in Chapter 5, form 5 : Variation

Monday; 31 May 2010....Biology paper f5...

EXAM...EXAM....EXAM....

Semua warga As Sharifah pada hari ini menghadapi peperiksaan.... Sunyi sekolah...

24 May 2010 - Exam mood....

http://www.ehow.com/how-does_5244674_papain-tenderize-meat_.html

Blood Test Activity : Science & Maths Week 2010...

4IK / 27.4.2010 - Act 4.3

SENARAI TOP TEN BIOLOGY : TEST 1

Tahniah kpd semua yang tersenarai. Kekalkan prestasi. Bagi yang lain, cuba lagi...


TIINGKATAN 4

BIL NAMA KELAS MARKAH
1. FARAH NUR DINI BINTI HAMIDI 4 IR 77
2. NOR ATIKA BINTI MUSBAH 4 IR 71
3. NADIA AMIRAH BINTI ZAKARIA 4 AK 70
4. NURUL ATIQAH BINTI HAZARAIMI 4 AK 70
5. NUR SYAHIRAH BINTI RAZAK 4 IK 67
6. NURUL HANIS BINTI SAMSUDIN 4 AK 67
7. NURUL ASHIKIN BINTI NORDIN 4 IK 67
8. SITI AISHAH BINTI KASIM 4 IS 65
9. SITI HANISA BINTI AWAL 4 IK 65
10. NORMUJAHIDAH BINTI HASHIM 4 AK 64
11. NOOR ELLYYU HAFIZAH M.ZAHAISHA 4 AK 64


TINGKATAN 5

BIL NAMA KELAS MARKAH
1. NURFARAHIN HANINI ACHIM 5 IR 72
2. NUR AMALINA BT ISMAIL 5 IR 69
3. UMMI NASRAH BT TALIB 5 IK 69
4. NUR AMALINA BT OMAR 5 IK 68
5. NUR ZAHIRAH BT ABD RANI 5 AK 64
6. NORA IZATIE BT ZAILAN 5 AK 62
7. NURULHUDA BT BORHAN 5 IR 60

ANTAGONISTIC MUSCLE

Antagonistic muscles are two sets of muscles which contracts in opposition to each other to move bones at joints.

Pairs of muscles that work together to allow coordinated movement of the skeletal joints in human.

Meaning that :
When one muscle contracts, the other muscles will relaxes.

One muscle pulls the bone in one direction, and the other muscle pulls it in the opposite direction.

In human; The biseps and triceps muscles are a good example to explain the concept of antagonistic muscles.


The bending of the upper limb / forearm :
When the biceps contracts,
the tendons will transmit the pulling force (produced by the contraction) to the forearm.
At the same time, triceps relaxes.
As a result, the elbow joint will bends, and the forearm moves upwards.

The straightening of the upper limb :
When the triceps contracts,the tendons will transmit the pulling force to the forearm.
at the same time,the biceps will relaxes,
the forearm is straightened / moves downwards.

If you get injured, we can see clearly the structure inside our body. All these pictures show it, but for those who are not brave enough, please don't see...

Knee ligaments injury

A broken forearm

Injury after a shooting attack

(http://clearharmony.net/articles/200408/21472.html)

Students Observations...

5AK 2010

5IS 2010...

Dear Everybody...

Biology... = the study of life...

Lets explore our life in the interesting and enjoyable subject...
B I O L O G Y . . .

Science & Maths Week '08

Skema Jawapan Ujian 1 Tkn 4

PART A (OBJECTIVE QUESTION)

ANSWER :

1. C 11.C

2. B 12.C

3. D 13.D

4. D 14.A

5. B 15.B

6. A 16.C

7. A 17.C

8. B 18.B

9. A 19.D

10.D 20.B

PART B (STRUCTURED QUESTION)

1. a) K = liver

L = stomach 4 correct – 2 m

M = duodenum 2 or 3 correct – 1 m

N = ileum (small intestine – REJECT) 1 only correct – 0 m

b) Cell à Tissue à Organ à System à Organism -------------------------- 1 m

c) Shoot system --------------------------------------------------------------------- 1m

List the organ : leaf / flower / bud / stem / shoot / fruit ------ (any 2) ---- 2 m

OR

Root system ---------------------------------------------------------------------- 1 m

List the organ : root / root hair ------------------------------------------------ 2 m

d) i) Nervous system / Integumentary system /

Circulatory system / Muscular system /

Endocrine system ----------------------------------------- (any 2) ---- 2 m

ii) Nervous system – detect the changes(increases or decreases) of

temperature.

Integumentary system – stop or increase sweating process.

Circulatory system – blood vessel(arteriole) will either constrict

(vasoconstriction) or dilate(vasodilation).

Muscular system – hair erector muscle will either contract to raise the

hairs or relax to lower the hairs.

Endocrine system – secrete more or less adrenaline / thyroxine hormone.

* any 2 correct explanation ------------- 2 m

2. a) X = phospholipid bilayer ------------------------------------------- 1 m

Y = carrier protein --------------------------------------------------- 1 m

Z = pore / channel protein ------------------------------------------ 1 m

b) i) 1. hydrophilic head ------------------------------------------------------------ 1 m

2. hydrophobic tail ------------------------------------------------------------ 1 m

ii) Characteristic : semi permeable / selectively permeable membrane ---- 1 m

Explanation : a membrane that allows only certain molecules /

substances / particles to pass through it -------------------- 1 m

iii) Main function :

Acts as a barrier between the internal & external environment of the cell //

Allows only specific molecules to pass through it //

Provide the structural basis for all cell membrane -------(any 1) --------- 1 m

c) i) Simple diffusion ----------------------------------------------------------------- 1 m

ii) Example :

· F1 : Gasses exchange at alveolus / body cells/tissues ---------------- 1 m

P1 - Oxygen that is in higher concentration at the alveolus

compare to in the blood capillary,

P2 - (so) Oxygen will diffuse from the alveolus to the blood

capillary.

P3 - Carbon dioxide that is more concentrated in the blood

capillary compare to in the alveolus

P4 - (so) Carbon dioxide will diffuse from the blood capillary to

the alveolus

F1 + any 2P --------------------------------------------------------------- 2 m

3 m

* similar explanation for at body cell/tissue

· F2 : Gasses exchange in unicellular organism ------------------------ 1 m

P1 - Oxygen is higher concentration in the water / surrounding

compare to in the Amoeba sp. / Paramecium sp. / unicellular

organism

P2 - (so) Oxygen will diffuse from the water into Amoeba sp. /

Paramecium sp. /the unicellular organism

P3 - Carbon dioxide is higher concentration in the Amoeba sp. /

Paramecium sp. / unicellular organism compare to in the

water / surrounding

P4 - (so) Carbon dioxide will diffuse from the Amoeba sp. /

Paramecium sp. / unicellular organism to the water /

surrounding

F2 + any 2P --------------------------------------------------------------- 2 m

3 m

PART C (ESSAY QUESTION)

1. i)

Amoeba sp.	Structure / Living processes	Paramecium sp.
Present	Pseudopodium	Absent
One	Number of contractile vacuole	Two
Absent	Cilia / Cillium	Present
One	Number of nucleus	Two / Micronucleus & macronucleus
With the help of pseudopodium	Movement / Locomotion	With the help of the cillium
Binary Fission or form spores when it’s in unfavourable condition	Reproduction	Binary Fission or conjugation when it’s in unfavourable condition

* any 4 correct differences ------------------------------ 4 marks

ii)

· Situation 1(S1) : Plant is not enough water ------------------------ 1mark

P1 – Transpiration is higher than water absorption -------------- 1 mark

P2 – More water molecules will diffuse out from stomata ------ 1 mark

3 marks

· Situation 2(S2) : Ecessive fertilizer given to the plant ----------- 1 mark

P1 – The soil becomes hypertonic // Root hair cell becomes hypotonic,

due to ecessive fertilizer. --------------------------------------- 1 mark

P2 – Water molecules will diffuse out from the root hair cells to the

soil ---------------------------------------------------------------- 1 mark

P3 – by / due to / via OSMOSIS ------------------------------------ 1 mark

* S2 + any 2P = 3 marks

ALam FLora....

The Good Observations in Bio Lab...

When you eat, always revise your NUTRITION topic...

KEPUTUSAN SPM 2009; SUBJEK BIOLOGI

Dengan seramai 9 orang yang memperolehi 'straight A', keputusan subjek Biologi ada sedikit kemerosotan..namun subjek Biologi masih tetap dapat mengekalkan, gred terendah yang diperolehi hanya setakat C; tiada D mahupun E.

Berikut adalah keputusan penuhnya :

A = 6 orang (6.98%)
A- = 9 orang (10.5%)
B+ = 17 orang (19.8%)
B = 23 orang (26.7%)
C+ = 27 orang (31.4%)
C = 4 orang (4.65%)

Sekalung tahniah & syabas kepada semua, terutama yang telah menyumbangkan A kepada subjek ini untuk tahun ini.

Kepada calon-calon SPM tahun 2010, semoga anda akan dapat mencipta sejarah yang setanding dengan kecemerlangan yang diharapkan.. Insya Allah...

Experimental Processes