Free Kingdom Animalia MCQs with Answers

681. Water vascular system is present in coelom in which phylum:

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

Explanation: The water vascular system is a hydraulic system unique to the phylum Echinodermata. It facilitates movement, feeding, and respiration in echinoderms, such as starfish and sea urchins. The other phyla listed-Annelida, Arthropoda, and Cnidaria-do not have this system. Annelida have a closed circulatory system, Arthropoda have an open circulatory system, and Cnidaria have a simple body structure without a vascular system.

682. All of the following are beneficial to human, except:

• A. Honey bee
• B. Silk worm
• C. Locust
• D. Insects for pollination

Explanation: Among the insects listed, locusts are not beneficial to humans. Locusts are notorious for forming large swarms that can devastate crops and vegetation. When they appear in massive numbers, they consume almost all the green plants in their path, causing severe economic losses and threatening food security. Therefore, they are considered harmful rather than beneficial.

683. A sponge of Antarctica which is more than a meter tall is known as?

• A. Euplectella
• B. Spongilla
• C. Leucosolenia
• D. Scolymastra joubini

Explanation: Anoxycalyx ( scolymastra) joubini is the largest and most conspicuous sponge in the Antarctica and although it has been observed as much as 1 m in height.

684. Whicjh of the following is a character found in Echinodermata?

• A. Marine habitat
• B. Spiny skin
• C. Water vascular system
• D. All of these

Explanation: Echinoderms are exclusively marine, they have spiny skin and they possess water vascular system for locomotion and transportation. Hence this is the correct option.

685. Radula is characterstics feature of:

• A. Myriapods
• B. Mollusca
• C. Echinoderms
• D. Cnidaria

Explanation: The explanation for this question will be added soon!Radula is an anatomical structure used by the molluscs for the mechanical food processing. Radula is minutely teethed and has chitinous ribbons.Radula is sometimes compared to tongue.

686. Eel like body is observed in:

• A. Chondrichthyes
• B. Osteoichthyes
• C. Cyclostomata
• D. Both A and B

Explanation: Cyclostomata belong to the phylum chordates and superficially it has an eel like resemblance.

687. Which of the following is an example of a tetrapod?A. Flesh fly B. TarantulaC. Blue-ringed octopusD. Humming bird

• A. Flesh fly
• B. Trantula
• C. Blue-ringed octopus
• D. Hummingbird

Explanation: A tetrapod is a vertebrate animal that has four limbs. This includes amphibians, reptiles, birds, and mammals. Humming birds, are tetrapods as they have 4 limbs (2 wings and 2 legs).The other options are not tetrapods.

688. Layer absent in diploblastic organism:

• A. Endoderm
• B. Epidermis
• C. Mesoderm
• D. Ectoderm

Explanation: Animals that are diploblastic only have two germ layers: ectoderm and endoderm. The mesoderm is missing in diploblastic animals. Diploblastic animals only have two germ layers: ectoderm and endoderm. The mesoderm, which forms muscles, circulatory systems, and other internal structures, is absent.

689. _ do not perform photosynthesis:

• A. Animals
• B. Bacteria
• C. Pinetree
• D. Spirogyra

Explanation: Only animals do not contain chloroplasts and cannot synthesize. All the other options can.

690. Opossum, Kangroo and tasmanian wolf are example of:

• A. Metatheria
• B. Prototheria
• C. Eutheria
• D. None of the above

Explanation: Metatheria are group of organisms that give birth to underdeveloped yound, that complete their developement in a pouch on the mother's belly. All the above organisms show this habit and are, therefore, known as Metatheria.