Quick Revision on Klinefelter Syndrome

 *Please click on image to enlarge.

Quick Check on Parthenocarpy

**Please click on image to enlarge.

Quick Check on Compensation Point

Compensation point  --The point reached in a plant when the rate of photosynthesis is equal to the rate of respiration. This means that the carbon dioxide released from respiration is equivalent to that which is taken up during photosynthesis. 

The compensation point is reached as light intensity increases. If the light intensity is increased beyond the compensation point, the rate of photosynthesis increases proportionally until the point of light saturation is reached, beyond which the rate of photosynthesis is no longer affected by light intensity.

Quick Look at Aeroponic

Aeroponics is one of the method used to improve the quality and quantity of food production.

Quick Check on Blood Group

Quick check on Blood Group ~ antigen and antibody.

Quick Look at Variation

CONTINUOUS VARIATION VERSUS DISCONTINUOUS VARIATION. 

TIPS:

When question ask you to COMPARE, please provide the SIMILARITIES  ,followed by A Table of differences. (2 column -Table )

Spinal Cord aka Saraf Tunjang

Imagine the spinal cord as the superhighway connecting the brain signals to control body movements. If that highway is damaged, the signals cannot get through. 

The spinal cord is the most important structure between the body and the brain. The spinal cord extends from the foramen magnum where it is continuous with the medulla to the level of the first or second lumbar vertebrae. It is a vital link between the brain and the body, and from the body to the brain. The spinal cord is 40 to 50 cm long and 1 cm to 1.5 cm in diameter.

Bengkel Persediaan Amali Sains 2016

Bermula 24/3 berakhir 26/3- Bengkel bertujuan memberi pendedahan kepada semua guru Biologi di WPKL mengenai pelaksanaan Amali bermula tahun 2016. Seramai 95 guru Bio menyertai bengkel tersebut yang dikendalikan oleh Jurulatih Kebangsaan seramai 4 orang ~

Peserta membentangkan hasil kerja KBAT..JUK memberi ulasan .

Barisan JUK dan peserta yang bersemangat

Mendengar presentation dari rakan-rakan.

Hands-on...Cikgu Yee sangat bersemangat.

Kesimpulan : Satu bengkel yang berkesan :)

Locomotion in Fish

To ALL 5 Adioda girls:

Locomotion in Fish

Please watch this video carefully before attending Bio Lesson on Tuesday 24/3/2015. This is important because on that day, an Active Learning will take place where all of you will be involved in doing experiment, brainstorming ideas and present your findings.

Locomotion in fish-How fish moves

Fish ~ Endoskeleton

* Water provides buoyancy and support for the fish
* The fish faces the problem of water resistance as water is denser than air
* To overcome this,
i. it has streamlined and slimy body
ii. and scales which face backwards

The fish has strong myotome muscles and fins adapted for swimming.
~Contraction and relaxation of the myotome muscles causes the body and the caudal fin to move from side to side, producing a forward thrust to push the fish forward.

ESSAY ~LOCOMOTION IN A FISH ( 10 marks max)

Fish are aquatic organisms

They face resistance when moving in water

The streamlined shapes –--to overcome water resistance and enable to move quickly in the water.

The skin is covered with scales that have slimy coat---help reduce water resistance

The muscles consist of muscle blocks i.e., MYOTOMES arranged in segments on both sides of the vertebral column.

The muscles act antagonistically.

Contraction of myotomes on one side of the vertebral column and relaxation on the other side

Causes the body to bend in a direction of the contraction

Alternate contractions of the right and left myotome blocks causes body to bend side to side and the tail to bend accordingly.

This produce a forward thrust which propels the fish forward

Presence of fins i.e. dorsal and ventral fins, paired pectoral and pelvic fins.--- for stability

Suggested Answer for 3 marks: SPM Essay 2005
--Fish has endoskeleton. It is a place of muscle attachement.
-Left myotome muscles contract and right myotome muscle relax antagonistically
-and tail moves to the left and right producing forward force.

Deforestation- Q&A

Please click on image to enlarge

 

Acid Rain -Q&A