Respiration is an catabolic process in which the organic compounds are oxidized to release energy, carbon dioxide and water. The liberated energy is stored in the ATP molecules (adenosine triphosphate), which are the energy currency of the cells. The four basic processes involved in respiration are-
(1) Pulmonary ventilation or breathing- It is the process of inflow of air into the lungs from the atmosphere (inspiration or inhalation) and outflow of air from the lungs to the atmosphere (expiration or exhalation). It is due to the difference in the air pressures according to the principle of Boyle's law.
(2) External respiration- It is the process of exchange of the oxygen and carbon dioxide between the inhaled air in the alveoli of the lungs and the deoxygenated pulmonary blood.
(3) Internal respiration- It is the process of exchange of gases between the oxygenated blood and the tissue cells of the body.
(4) Cellular respiration- It is the process of oxidation of the respiratory substrates like glucose inside the cells.
Thus, the four processes of respiration include the pulmonary ventilation, external respiration, internal respiration and cellular respiration.
Answer:
legumes are able to form a symbiotic relationship with nitrogen-fixing soil bacteria called rhizobia.The result of this symbiosis is to form nodules on the plant root,within the bacteria can convert atmospheric nitrogen into ammonia that can be used by the plant
D.uracil is the nitrogen base bind with adenine
Answer:
The correct option is A. Charophytes and land plants share three distinctive traits.
Explanation:
Charophytes can be described as a group of algae that acquire a freshwater habitat. They are similar to both algae and land plants. Scientists have found pieces of evidence which proved that old charophytes were ancestors of land plants. Scientists believe that in the past a charophyte emerged on land and gave rise to the land plants. Hence, statement B is not correct.
Statement C is false because charophytes are not embryophytes.