Question

6. Which of the following acids is the end product of
fermentation?
(a) Hydrochloric acid (b) Lactic acid
(c) Pyruvic acid
(d) Citric acid
7. Gaseous exchange in plants takes place through the
(a) stomata
(b) gills
(c) lungs
(d) alveoli
8. Gaseous exchange in fish takes place through the
(a) trachea
(b) lungs
(c) gills
(d) alveoli​

Answer 1

Hølà mate❤️.

Lactic acid

Stomata

Gills.

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Answer 2

Answer:

1. Lactic acid is the end product of fermentation.
2. Gaseous exchange in plants takes place through the stomata.
3. Gaseous exchange in the fish takes place through the gills.

Explanation:

1. What is the end product of fermentation?

• In anaerobic respiration (which occurs in the absence of oxygen) a fermentation process occurs and lactic acid is formed.
• It is also called lactic acid fermentation.
• In this process, glucose is partially oxidized and forms alcohol (ethanol) and acid  (lactic acid) with less energy (ATP).

2. Gaseous exchange in plants:

• Gaseous exchange in plants takes place through the stomata that are present in the leaves of plants.
• Stomata are the tiny pores through which gaseous exchange takes place by diffusion process.

3. Exchange of gases in fish:

• Gaseous exchange in fish takes place through the gills.
• A gill is the respiratory organ present in the fish through which gaseous exchange of dissolved oxygen and carbon dioxide takes place.
• A fish breathes as it swims by opening mouth and allowing water flow through the gills.

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