Free Kingdom Animalia MCQs with Answers

811. The survival of an animal depends upon its ability to take some_from enviroment?

• A. Hydrocarbons
• B. Organic molecules
• C. Chemicals
• D. All of these

Explanation: An animal's survival does depend on its ability to take chemicals from the environment. An organism obtains the chemicals necessary for its survival from the environment.These chemicals include:Water: Water is essential for all life. It is used for a variety of purposes, including transporting nutrients, removing wastes, and regulating body temperature.Food: Animals need food to provide them with energy and the nutrients they need to grow and reproduce. Food can be obtained from plants, animals, or other sources.Oxygen: Oxygen is essential for cellular respiration, the process by which cells produce energy. Oxygen can be obtained from the air or from water.Other chemicals: Animals also need other chemicals, such as minerals, vitamins, and hormones, for their survival. These chemicals can be obtained from the food they eat, the water they drink, or the air they breathe.

812. The organs of locomotion in annelids are which of the following?

• A. Muscle tissues
• B. Hydrostatic skeleton
• C. Parapodia
• D. Bones

Explanation: The locomotory organs in annelids include parapodia, suckers, and setae. Annelids are segmented worms that belong to the phylum Annelida. Their movement depends on special structures that help them crawl, burrow, or swim. According to the textbook, the organs of locomotion in annelids include parapodia, suckers, and setae. Parapodia are paired, fleshy, paddle-like structures found mainly in marine annelids such as polychaetes. They assist in crawling on the sea floor and also help in swimming. Each parapodium often contains many bristles called setae, which provide grip and support during movement. For annelids that do not have parapodia, such as earthworms, setae alone help them anchor different segments to the ground while their muscles push the body forward.

813. All of the following are true for platyhelminthes except?

• A. Triploblastic
• B. Bilateral Symmetry
• C. Coelomate
• D. Flatworms

Explanation: Platyhelminthes are not coelomates; instead, they are acoelomates. They lack a true body cavity between the body wall and the digestive tract. Their internal spaces are filled with mesenchyme, which limits organ specialization compared to higher groups. Because this statement claims they are coelomate, it is false and is the correct exception.

814. The sponges in which sperms develop first are included in the category of?

• A. Peritandrous
• B. Pertandrous
• C. Protonema
• D. Protandrous

Explanation: Protandry is a reproductive strategy where an organism starts as a male and later becomes a female. In the context of sponges, which are hermaphroditic (possessing both male and female reproductive organs), protandry refers to the fact that sponges initially produce and release sperm before transitioning to producing eggs.

815. Excretory system of platyhelminthes consists of which of the following?

• A. Nephridia
• B. Flame cells
• C. Malpighian tubules
• D. Nephron

Explanation: The excretory system of Platyhelminthes consists of flame cells because these specialized cells help remove metabolic waste from the body.Flame cells contain beating cilia that look like a flickering flame, which helps draw waste-containing fluid into the tubules.This fluid then moves through a network of ducts and exits through pores on the body surface.

816. Garden snail belongs to which class of Mollusca?

• A. Gastropoda
• B. Cephalopoda
• C. Bivalvia
• D. None of these

Explanation: The garden snail is a part of the class Gastropoda within the phylum Mollusca. Gastropods are the largest group of mollusks and are known for their single, often spirally coiled shells. Snails, including the garden snail (Helix aspersa), are typical examples of this class. Cephalopoda, such as octopuses and squids, and Bivalvia, such as clams and mussels, belong to different classes within Mollusca and have distinct characteristics and structures. Myriapoda is not a class within Mollusca but is a subphylum under Arthropoda, which includes centipedes and millipedes.

817. The internal buds are known as which of the following:

• A. Spicules
• B. Choanocytes
• C. Gemmules
• D. Both Options A and B are correct

Explanation: Spicules are the structural components of a sponge, or the "bricks," and the shapes, sizes, and composition are unique for each species.Choanocytes are the flagellated cell with a collar of protoplasm at the base of the flagellum, numbers of which line the internal chambers of sponges.Gemmules are a tough-coated dormant cluster of embryonic cells produced by a freshwater sponge for development in more favourable conditions.Therefore, option C is right choice here.

818. A body cavity is absent in:

• A. Acoelomates
• B. Pseudococlomates
• C. Aeoclomates and Pscudocoelomates
• D. Coelomates

Explanation: Acoelomates are those animals in which there is no body cavity or space between body wall and digestive system. This group includes only one phylum Platyhelminthes.

819. Division of labor is not seen in which of these multicellular animals?

• A. Hydra
• B. Euplectella
• C. Blood fluke
• D. Tapeworm
• E. A and b

Explanation: Hydra is another example of an animal that doesn't show division of labor. It has limited cell specialization and lacks distinct organs. Its cells work together to perform various functions.

820. The skeleton of the sponges is in the form of variously shaped needle like structure called:

• A. Stipules
• B. Brails
• C. Spine
• D. Spicules

Explanation: Based on the explanations provided, the correct answer to the question is option D) Spicules.