Free Kingdom Animalia MCQs with Answers

831. The nervous system of Arthropoda resembles which of the following phylums?

• A. Annelida
• B. Mollusca
• C. Plathyelminthes
• D. Coelenterata

Explanation: The' arthropod nervous system' consists of a dorsal brain and a ventral, ganglionated longitudinal nerve cord (primitively paired) from which lateral nerves extend in each segment. The system is similar to that of 'annelid worms', from which arthropods may have evolved.

832. Lack of symmtery is identified in which group of animals?

• A. Porifera
• B. Parazoa
• C. Coelomates
• D. Protozoa

Explanation: Parazoa refers to the class of organisms in the kingdom Animalia which lacks tissue grade of organization. Only Porifera (sponges) are included in this phylum.

833. This group of animals has three bones in the ear:

• A. Reptiles
• B. Mammals
• C. Both reptiles and mammals
• D. Birds and mammals

Explanation: Modern mammals are unique among vertebrates for possessing three tiny bones in the middle ear. The malleus, incus, and stapes (commonly known as the hammer, anvil, and stirrup) work as part of a chain that transmits sound toward the skull. Birds and reptiles have only one bone to perform this function.

834. Which one of the following is not a feature of the nervous system of Planaria?

• A. Nuerons are differentiated into sensory, motor and associative neurons.
• B. Nerves are present.
• C. No specialized sensory organs are present.
• D. All of the above.

Explanation: 1. Planaria is a flatworm and belongs to the phylum Platyhelminthes. 2. It is the most primitive animal with a Central Nervous System (CNS) located on the ventral side of the body. 3. Nervous system consists of a mass of cerebral or cephalic ganglion appearing like an inverted U-shaped brain. 4. Ventrally from below the ganglia arise a pair of Ventral Nerve Cords (VNC) or long nerve cords. These are interconnected to each other by transferring nerve or commissure in a ladder-like manner. 5. The PNS include sensory cells arranged in lateral cords in the body.Therefore, option C is not correct.

835. Which is not the characteristic of triploblastic?

• A. They may be coelomate pseudocoelomate or acoelomate
• B. They are included in grade bilateria
• C. All of them have a digestive system
• D. All of them have blood vascular system

Explanation: Correct option is D. Option D is not a feature of triploblastic animals.

836. Which of the following are called placental mammals?

• A. Prototheria
• B. Metatheria.
• C. Eutheria.
• D. All of these.

Explanation: c) Eutheria: This is the correct option. Eutheria, also known as placental mammals, are a diverse group of mammals that give birth to more fully developed live young. These mammals have a placenta that provides nourishment and support to the developing embryo inside the mother's womb.

837. Name the class without antennae.

• A. Arachnida.
• B. Insecta.
• C. Myriapoda.
• D. Crustacea.

Explanation: a) Arachnida: Arachnids are a class of arthropods that include spiders, scorpions, ticks, and mites. Arachnids typically do not have antennae. Instead, they have specialized structures called pedipalps that serve sensory and feeding functions.

838. Which of the following damages wooden ships?

• A. Sepia.
• B. Teredo.
• C. Limax.
• D. Ostrea.

Explanation: Teredo is one of the genera wood-boring bivalve shipworms.

839. Which of the following do not have a body cavity?

• A. Pseudocoelomata
• B. Coelomata
• C. Acoelomata
• D. None of these

Explanation: Acoelomate is an animal that does not possess a body cavity

840. Larvae of which group are similar to chordates?

• A. Echinodermata
• B. Annelida
• C. Arthropoda
• D. Nematoda

Explanation: Option[A] The larvae of echinodermata [called dipleurula larva] are characterized by bilateral symmetry. The larvae of chordates[ tornaria larva] also have bilateral symmetry so option [A] IS RIGHT.The other options are eliminated as follows:Option [B] Annelida has a free swimming trochophore larvae which is different from that of chordates.Option [C] Arthropods have larva [called instar or nymph] that is different from larvae of chordates.Option [D] Nematoda has a larval stage during their life cycle which is quite different from chordates.