Question

An amoeba ingests food by

• A. Cilia
• B. Tentacles
• C. Pseudopodia
• D. Feeding tube

Answer 1

The correct option is C

Pseudopodia

The correct option is C:

Explanation of the correct option:

Option C:

1. A unicellular organism, an amoeba. By expanding or retracting pseudopodia, it frequently modifies its form.
2. A free-living organism without a cell wall is an amoeba. A prokaryotic organism, that is. They lack a distinct nucleus and other organelles that are membrane-bound.
3. Pseudopodia are used by the amoeba to move about and consume food.
4. Amoeba has a variety of food sources. Some organisms eat bacteria and other protists to survive, while others eat dead and decaying organic substances.
5. By expanding their pseudopods, amoebas consume their meal. These elongated pseudopods enclose and devour living animals or small objects. It is known as phagocytosis or endocytosis.

Explanations of the incorrect option:

Option A:

1. Cilia is a long filamentous hair-like structure.
2. It is used for locomotion in the organism.
3. Lancelets and numerous other aquatic invertebrates use their cilia for feeding.

Option B:

1. Tentacles are the long processes that contain blood vessels and are extensions of the body cavity and coelom.
2. The main function of tentacles is feeding and grasping. Some also have the sensory organs for touch, vision, etc.
3. Tentacles are used for feeding by mollusks, cnidarians, ctenophores, bryozoa, and trypanorhynch cestodes.

Option D:

1. A feeding tube is not present in amoeba.
2. The main function of a feeding tube is to provide nutrients without eating from the mouth.

Final answer: An amoeba ingests food by pseudopodia.