Question

Hii....
can u plz give me d ansr of this qstn....?
biology of class 9th.... of ICSE board... ​

Answer 1

Answer: 4.(a):lenticels:lenticels are in the small area of the bark. These cells are loosely placed and therefore allow the gaseous exchange of respiratory gases between air and living cells of the woody stem. It is through stomata that oxygen from air diffuses into the stem and goes to all the cells of a stem for respiration.(b): stomata:plants breathe too, but they do it through the tiny openings in leaves called "stomata". Stomata open and close to al allow the intake of carbon dioxide and the released of oxygen.(c): Root hairs:Root hairs are the tiny elongated cells which increase the surface area of the root for maximum water absorption. While water is not directly required for respiration, it is required in photosynthesis and glucose made during photosynthesis is used in respiration.

Q#2: DIFFERENCE BETWEEN AEROBIC AND ANAEROBIC RESPIRATIONS IN PLANTS:

BASIS FOR COMPARISON AEROBIC RESPIRATION ANAEROBIC RESPIRATION

Definition The breakdown of glucose in the presence of oxygen to produce more amount of energy is called as aerobic respiration. The breakdown of glucose in the absence of oxygen to produce energy is called as anaerobic respiration.

Chemical Equation Glucose + Oxygen gives Carbon dioxide +water + energy Glucose gives Lactic acid + energy

It occurs in The cytoplasm to mitochondria. Takes place in cytoplasm only.

Energy produced The high amount of energy is produced. Less amount of energy produced.

Number of ATP released 38 ATP. 2 ATP.

Final product is Carbon dioxide and water. Lactic acid (animal cells), carbon dioxide and ethanol (plant cell).

It requires Oxygen and glucose to produce energy. It does not require oxygen but uses glucose to produce energy.

It involves 1. Glycolysis - also called Embden-Meyerhof-Parnas(EMP) pathway.

2. The respiratory chain (electron transport and oxidative phosphorylation).

3. The tricarboxylic acid cycle (TCA), also known as the citric acid cycle or Krebs cycle.

1. Glycolysis.

2. Fermentation

Process of combustion Complete Incomplete.

Type of process It is a long process for the production of energy. It is a fast process in comparison to aerobic respiration.

Examples Aerobic respiration occurs in many plants and animals (eukaryotes). Anaerobic respiration occurs in human muscle cells (eukaryotes),