Question

Two very small organisms X and Y both reproduce by the method of budding. Organism X is industrially very important because it is used in making alcohol from sugar. It is also used in making bread. Organisms Y is a tiny animal having tentacles which live in water. 

(a) What is organisms X? 

(b) Name the process in which X converts sugar into alcohol. 

(c) To which class of organism does X belong? 

(d) What are organisms Y? 

(e) Out of X and Y, which organism is multicellular and which one is unicellular?

Answer 1

(a) X is Yeast. 

Explanation: Yeasts are unicellular fungi which convert glucose into alcohol through the process of fermentation.

(b) The process in which X converts sugar into alcohol is called Fermentation. 

Explanation:The following chemical reaction takes place: 

Yeast + Glucose → Alcohol (l) + CO₂ (g)

(c) The organism X i.e. Yeast belongs to the fungi of living organisms. 

Explanation: Yeast is a single-cellular organism which divides by mitosis and shows budding. 

Fungi have the following characteristics:

1. They have a cell wall. 

2. They have a nucleus. 

3. They have no chloroplasts.

(d) Organism Y is Hydra. 

Explanation: Hydra is a genus of small fresh-water animals

(e) Yeast ( X) is a unicellular and Hydra (Y) is a Multicellular. 

Explanation: Yeasts are unicellular organisms because they are single-celled organisms.

Hydra are multicellular organisms with complex bodies