Free Biodiversity and Variety of Life MCQs with Answers

1301. Which structure is responsible for the excretion in Arthropods?

• A. Nephron
• B. Protonephridia
• C. Metanephridia
• D. Malpighian tubes

Explanation: Malpighian tubules are the primary excretory organs in arthropods, including:1. Insects (e.g., beetles, flies, bees)2. Arachnids (e.g., spiders, scorpions)3. Crustaceans (e.g., crabs, lobsters)These tubules remove waste products, such as nitrogenous compounds, from the hemolymph (arthropod equivalent of blood) and excrete them outside the body. Malpighian tubules are usually found in pairs and are connected to the digestive system.

1302. Alternation of generation is the character of _ phylum?

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

Explanation: Alternation of generations is a life cycle characteristic of the phylum Cnidaria, which includes Jellyfish,Corals,Sea anemones,Hydra

1303. The largest group in the animal kingdom is:

• A. Arthropoda
• B. Mammals
• C. Mollusca
• D. Nematodes

Explanation: Correct, as this phylum includes insects, crustaceans, and arachnids, making it the largest animal group.

1304. The different members of colonies in coelenterates that perform different functions are:

• A. Workers
• B. Drones
• C. Zooplanktons
• D. Zooids

Explanation: Correct, because coelenterates like corals and siphonophores have specialized individuals called zooids that perform different functions.

1305. Fasciola, an endoparasite in sheep, is mostly found in:

• A. Blood of sheep
• B. Large intestine of sheep
• C. Liver and bile duct of sheep
• D. Stomach of sheep

Explanation: Liver and bile duct of sheep - Correct. Fasciola hepatica (liver fluke) resides in the liver and bile ducts, causing liver rot.

1306. Animals having jointed legs and a chitinous exoskeleton are known as:

• A. Chordates
• B. Arthropods
• C. Annelida
• D. Mollusca

Explanation: Arthropods - Correct. Arthropods, such as insects, crustaceans, and arachnids, have jointed appendages and a chitinous exoskeleton.

1307. In frogs, new air is drawn into the buccopharyngeal cavity through the nostrils, and old air is retained under pressure in:

• A. Lungs
• B. Nasal
• C. Glottis
• D. Trachea
• E. Nostrils

Explanation: The correct answer is A Lungs. In frogs, the process of respiration involves the use of both the nostrils and the lungs. When a frog breathes, new air is drawn into the bucco-pharyngeal cavity (the oral cavity and pharynx) through the nostrils. From there, the air moves into the lungs for gas exchange.

1308. Class turbellaria, trematoda and cestoda belong to phylum:

• A. Echinodermata
• B. Porifera
• C. Aschelminthes
• D. Cnidaria
• E. Platyhelminthes

Explanation: The correct answer is Platyhelminthes. Option E The classes Turbellaria, Trematoda, and Cestoda belong to the phylum Platyhelminthes. Platyhelminthes, commonly known as flatworms, is a phylum of invertebrates characterized by their flattened body shape. The class Turbellaria includes free-living flatworms that are often found in freshwater or marine environments.

1309. Achatina fulica Is an giant snail that is dangerous:

• A. For agricultural pest
• B. For silk worm
• C. For paper industry
• D. For sericulture pest

Explanation: Achatina fulica Is a giant snail that is a dangerous agricultural pest. So Option A is the correct answer.

1310. Water vascular system or ambulacral system is a unique and complex system specially present in?

• A. Sponges
• B. Arthropods
• C. Echinoderms
• D. Fishes

Explanation: Echinoderms, which include organisms like starfish, sea urchins, and sea cucumbers, possess a unique and complex system called the water vascular system or ambulacral system. This system consists of a network of fluid-filled canals and appendages called tube feet, which are used for locomotion, feeding, and respiration.