prabha: what is a thylakoid membrane ?

ibrahim: there is no such hing as chlorophyll cell

ibrahim: which in a chloroplast

ibrahim: it is found in the Thylakoid Membrane.

ibrahim: Chlorophyll is a part of a cell not a cell

ibrahim: http://en.wikipedia.org/wiki/Protist

ibrahim: evidence:

ibrahim: Protists are simply a group of eukaryotic microorganisms.

Sandra.: ATP is the energy used by an organism in its daily operations. It consists of an adenosine molecule and three inorganic phosphates.

wilber: all are ways of plant repisring

wilber: respirations in plants: 1) aerobic respiration and 2) anaerobic respiration. Aerobic respiration involves (a) glycolysis, (b) Krebs' cycle, and (c) oxidative phosphorylation (ETS). Anaerobic respira

wilber: plant use Respiration is a metabolic process where complex substances are broken down into simple sugars, carbon dioxide, and water. By this process energy is released. There are two types of respira

szerui: no .. plants do not use all cells to respire. better explansation : http://www.worsleyschool.net/science/files/photosynthesis/page.html

thnks for all commentssss....~

through the whole science lesson, we learnt that:

PHOTOSYNTHESIS
1.photosynthesis is the chemical process by which plants make food-glucose, a type of sugar- in their leaves in the presence of sunlight.

2. Plants have cells with chloroplasts which contain chlorophyll. This green substances is used to trap light energy. Only cells with chloroplasts can be the site of photosynthesis. During the process of photosynthesis, Light energy becomes chemical energy for photosynthesis to take place.

3.Water and carbon dioxide are the raw materials for photosynthesis. Water is absorbed from the soil while carbon dioxide comes from the air. The carbon dioxide enters the plant througho the small holes called stomata, found mainly on the underside of the leaves.
Questions on this point: Why is the stomata found on the underside of the leaves but not on top of it?

4. Glucose and oxygen are the products of photosynthesis. Oxygen is released into the air through stomata. Oxygen is used by living things for respiration.

5. Being soluble in water, glucose can be lost easily. In order to store it, some plants convert it into starch which is insoluble. A positive test for starch is by using iodine solution on a boiled leaf [after removing chlorophyll] which will indicate that photosynthesis has taken place when the iodine turns from yellowish-brown to blueish-black.

6.photosynthesis equation:
carbon dioxide + water -->[with the help of light energy and chlorophyll] glucose + oxygen.

7. Both sunlight and artificial light will allow plants that have chlorophyll to carry out photosynthesis. The greater the light intensity, the greater is the rate of photosynthesis. Below are some factors that affect the rate of photosynthesis:
[a] carbon dioxide concentration
[b] water concentration
[c] chlorophyll concentration
Questions on this point: What are carbon dioxide, water and chlorophyll concentration?

8. Photosynthesis does not happen only in leaves. For example, Cacti have green stems that can make food.
Questions on this point: so does this mean that cacti have chlorophyll on their stems instead on their prick/leaves?

9. Some plants have variegated leaves which have green and non-green parts. The green parts can carry out photosynthesis while the non-greens parts cannot.
Questions on this part: so, some part of the leaves doesnt carry out photosynthesis. does this mean that they do not have alot of nutrients?

10.[extra information] Leaves of plants change colour in the autumn because their chlorophyll breaks down revealing other colours such as orange and yellow.
Questions on this point: Why cant is be other colours like red , blue , pink?

1. Respiration is the chemical process whereby energy is released from the breaking down of food an organism had consumed in the presence of oxygen.

2. Chemical energy in food is converted to energy for activities like walking, sitting, sleeping, growing, breathing, etc.

3. Respiration occurs in almost all living things [plants and animals] all the time [day and night].

4. Respiration take place in every living plants and animals cell.

5.Respiration requires oxygen and food [e.g. glucose]

6. [informations] When we breathe in air, oxygen is absorbed into the bloodstream in the lungs. The blood then carries oxygen to the cells around our body. Our digestive system breaks down the food we consume so that nutrients such as glucose is absorbed into the bloodstream. The blood then carries the glucose to the cells around our body.

7. Respiration produced carbon dioxide, water and energy.

8. Respiration equation:

Oxygen + glucose--> [with the help of living cells] carbon dioxide + water + energy

Note: So far, we only had been talking about aerobic respiration which occurs only when there is oxygen. Anerobic respiration occurs in the absence of oxygen. it produces lactic acid which gives you muscle cramps.

9. Differences between respiration and breathing:

respiration: -takes place in every living cells.

- A chemical process whereby energy is released from the foood [glucose]

breathing: -takes place in lungs

-A physical process in which there is an exchange of gases [air with more oxygen is inhaled and air with more carbon dioxide is exhaled.]

through today science,
i am still very confuse..

here are the Questions i would like to ask and verify it ><
1. From what group 6 wrote on their poster, they said that when plants RESPIRE, they uses all the cell, so does this mean that plant uses chlorophyll to respire? If yes, why is this so? What is the use of Chlorophyll during RESPIRATION?

Group 6 also said that when plant PHOTOSYNTHESIS, they said that plants uses only the chlorophyll cell. Is this so? i thought other cells also help in the photosynthesis? like the stomata, root cell and so on..

2. From what group 7 said, PHOTOSYNTHESIS is the process by which plants, some bacteria, and some protistans use the energy from sunlight to produce sugar, which cellular respiration converts into ATP, the "fuel" used by all living things.

So, What do they mean? What is protistans? what is ATP and ADP?
They said that " Some bacteria, and some protistans use the energy from sunlight to produce sugar, which cellular respiration converts into ATP, the "fuel" used by living things" So does it mean that some bacteria have chlorophyll which allows them to photosynthesize and use the energy from sunlight to produce sugar?

3. -

Here are the things i had learnt (:
1. I learnt that the conversion of unusable sunlight energy into usable chemical energy, is associated with the actions of the green pigment chlorophyll. Most of the time, the photosynthetic process uses water and releases the oxygen that we absolutely must have to stay alive.

2. -

3. -

-the end-

the Questions and learning point will continue next time (:

JESLYN!: OH, and plants breathe through stomata. Right?

JESLYN!: Heyy, chlorophyll is used in respiration?

ariel: since you came up with this theory, can you please explain a theory much different from yours here's the link: http://wiki.answers.com/Q/Can_plants_live_without_oxygen

~Linda~: Em i don tink its suitable to say tat oxygen is a waste to the plants becoz eventually they will need to use the oxygen for respiration also.

wilber: and exchange of gaseous occurs through stomata on the underside mostly and less on the upperside

wilber: aerobically

wilber: Plants breathe by respirating