(a) Give the main points of difference between respiration in plants and respiration in animals.
(b) Describe the exchange of gases which takes place in the leaves of a plant (a) during daytime, and (b) at night.
(c) Which contains more carbon dixoide : exhaled air or inhaled air ? Why ?
(a) Give the main points of difference between respiration in plants and respiration in animals.
(b) Describe the exchange of gases which takes place in the leaves of a plant (a) during daytime, and (b) at night.
(c) Which contains more carbon dixoide : exhaled air or inhaled air ? Why ?
(a)
Plants do not breathe, they only respire. Animals usually breathe in the air for carrying out cellular respiration.
Plants lack a respiratory system, which is usually found in animals.
In plants, the leaf obtains oxygen directly from the air through the stomata. Stems and roots also take in oxygen. In case of animals, oxygen is taken in through special openings (like nostrils or gill clefts) into the respiratory organ.
In animals, there is a respiratory organ (like lungs, gills, etc.) present within the body, where the exchange of gases occurs. No such respiratory organ is present in plants.
The carbon dioxide produced in animals during respiration is released to the atmosphere, whereas the carbon dioxide produced during plant respiration may be used by the plant for carrying out photosynthesis.
There is no respiratory pigment in case of plants, whereas in animals, respiratory pigments play an important role in transporting oxygen to the cells.
Respiration in plants can also proceed in a manner that produces neither metabolic energy nor carbon skeletons, but heat. This type of respiration involves the cyanide-resistant, alternative oxidase; it is unique to plants, and resides in the mitochondria.
Respiration in Plants:
- Respiratory organs in plants are generally stomata in leaves, lenticels in stem, and the general surface of roots.
- The rate of respiration is slow.
Respiration in Animals:
- Respiratory organs in animals is generally the lungs, and the gills.
- The rate of respiration is fast.
(b)
(a) During day, plants take carbon dioxide and exchanged it into oxygen.
(b) During night, plants take oxygen and exchanged it into carbon dioxide.
(c)
exhaled air contains more CO2. because the air which we exhale comes from each and every cell of the body. the cell intake oxygen and after using it exhale co2.
when we intake air its a mixture of all gases (air) and the amount of O2 is more
but when we exhale an exchange of gases takes place in the lungs where the CO2 released from all the cells of the organism after the production of energy is exhaled while O2 which more concentrated in the air is inhaled . It happens because of concentration difference by osmosis
thus when we inhale we take in more oxygen than CO2 than when we exhale
(a)
Plants do not breathe, they only respire. Animals usually breathe in the air for carrying out cellular respiration.
Plants lack a respiratory system, which is usually found in animals.
In plants, the leaf obtains oxygen directly from the air through the stomata. Stems and roots also take in oxygen. In case of animals, oxygen is taken in through special openings (like nostrils or gill clefts) into the respiratory organ.
In animals, there is a respiratory organ (like lungs, gills, etc.) present within the body, where the exchange of gases occurs. No such respiratory organ is present in plants.
The carbon dioxide produced in animals during respiration is released to the atmosphere, whereas the carbon dioxide produced during plant respiration may be used by the plant for carrying out photosynthesis.
There is no respiratory pigment in case of plants, whereas in animals, respiratory pigments play an important role in transporting oxygen to the cells.
Respiration in plants can also proceed in a manner that produces neither metabolic energy nor carbon skeletons, but heat. This type of respiration involves the cyanide-resistant, alternative oxidase; it is unique to plants, and resides in the mitochondria.
Respiration in Plants:
- Respiratory organs in plants are generally stomata in leaves, lenticels in stem, and the general surface of roots.
- The rate of respiration is slow.
Respiration in Animals:
- Respiratory organs in animals is generally the lungs, and the gills.
- The rate of respiration is fast.
(b)
(a) During day, plants take carbon dioxide and exchanged it into oxygen.
(b) During night, plants take oxygen and exchanged it into carbon dioxide.
(c)
exhaled air contains more CO2. because the air which we exhale comes from each and every cell of the body. the cell intake oxygen and after using it exhale co2.
when we intake air its a mixture of all gases (air) and the amount of O2 is more
but when we exhale an exchange of gases takes place in the lungs where the CO2 released from all the cells of the organism after the production of energy is exhaled while O2 which more concentrated in the air is inhaled . It happens because of concentration difference by osmosis
thus when we inhale we take in more oxygen than CO2 than when we exhale
