Free Kingdom Animalia MCQs with Answers

371. Which of the following are animals with pointed ends and a tube-like digestive tract?

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

Explanation: Nematodes are known for having tapered ends (i.e. pointy ends). Arthropods, mollusca and annelids are not known or identified by their shape having pointed ends (and organisms under these generally do not have tapered ends). So Option C is correct.

372. Select an anamniote from the following:

• A. Snake
• B. Parrot
• C. Frog
• D. Crocodile

Explanation: Amniotes are tetrapods (descendants of four-limbed and backboned animals) that are characterised by having an egg equipped with an amnion, an adaptation to lay eggs on land rather than in water as the anamniotes (including frogs) typically do. The anamniotes are an informal group of craniates comprising all fishes and amphibians, which lay their eggs in aquatic environments.

373. Class Elasmobranchi have an outer covering of?

• A. Placoid scale
• B. Cycloid
• C. Ctenoid scales
• D. Epidermal scales

Explanation: The outer covering of Elasmobranchs is placoid. It consists of no continuous covering of scales of ganoid plates, but of more or less numerous detached grains, tubercles or spines, composed of bony of dentinal matter and scattered here and there in the integument.

374. Which group of organisms has the following features? I. Three pairs of jointed legs II. Three-part segmented body III. One pair of antennae

• A. Arachnids
• B. Crustaceans
• C. Insects
• D. Myriapods

Explanation: Insects are arthropods that have three body segments, three pairs of legs, one pair of antennae, and many have one or two pairs of wings. The three body sections are called the head, the thorax, and the abdomen. Wings and legs are attached to the thorax, the middle section.

375. The table shows some characteristics of four different vertebrates. Which vertebrate is a reptile? ✓= feature present x = feature absent

• A. Option A
• B. Option B
• C. Option C
• D. Option D

Explanation: Reptiles do not have fins and hairs but they do have scales and legs.

376. All of the following are mammals except the:

• A. Porpoise
• B. Shark
• C. Whale
• D. Walrus
• E. Seal

Explanation: Shark is a cartilaginous fish belonging to the class Chondrichthyes. All other options are wrong as they are mammals

377. Which one of the following animals possesses an open circulatory system:

• A. Amoeba
• B. Earthworm
• C. Grasshopper
• D. Man

Explanation: Among the options provided, the animal that possesses an open circulatory system is the Grasshopper. An open circulatory system is a type of circulatory system where the circulating fluid, called hemolymph, is not confined to blood vessels but instead bathes the tissues directly. In this system, the hemolymph is pumped by a simple heart into the body cavity, where it comes into direct contact with the organs and tissues. The fluid then returns to the heart, and the cycle repeats. Now, let's go through the options: Amoeba: Amoebas are unicellular organisms and do not possess a circulatory system. They rely on simple diffusion to exchange gases and nutrients across their cell membranes. Earthworm: Earthworms have a closed circulatory system. However, they have a modified version called a "closed circulatory system with open-ended vessels." In this system, the blood, or more accurately, the coelomic fluid, is contained within vessels, but those vessels are not completely closed. The coelomic fluid flows through the vessels and the body cavity, allowing direct contact with the tissues. Grasshopper: Grasshoppers have an open circulatory system. Their circulatory system consists of a tubular heart that pumps hemolymph into the body cavity, where it directly bathes the organs and tissues. The hemolymph eventually re-enters the heart, and the process continues. Man: Humans, like other mammals, possess a closed circulatory system called the cardiovascular system. The blood is pumped by the heart into a network of blood vessels, including arteries, veins, and capillaries, which deliver oxygen, nutrients, and hormones to the tissues and remove waste products. In summary, the animal from the given options that possesses an open circulatory system is the Grasshopper.

378. Which one of following is a true fish?

• A. Cuttle fish
• B. Silver fish
• C. Jelly fish
• D. Sea fish

Explanation: True fish have a backbone (inner skeletal system of bones), gills they breathe through, & fins & a tail for propulsion. There is no organism labelled Sea fish. However, options A, B, and C can be eliminated since they all refer to False fish. Cuttlefish is a mollusk. Silverfish is an arthropod. C is wrong because A fish must have gills, fins, and vertebra which is all lacking in a jellyfish.

379. The mammals termed as the connecting link between reptilians and mammals are:

• A. Marsupials
• B. Eutherians
• C. Monotremes
• D. Metatherians

Explanation: The monotremes are a group of highly specialised egg-laying predatory mammals, containing the platypus. Platypus is known as connecting link between reptiles and mammals as it has both the characters of mammals and reptiles. It has mammalian characters such as hair, mammary glands, diaphragm. It is oviparous and lays eggs like reptiles.

380. Bipinnaria is the larval form of:

• A. Coelenterate
• B. Potychaeta
• C. Echinodermata
• D. Cestoda

Explanation: Bipinnaria larva is the larva of class Asteroidea of phylum Echinodermata. It possesses 5 pairs of ciliated arms, which do not have any skeletal support inside. These arms are used for swimming in water, while feeding on planktons. Preoral and postoral ciliary bands are also present. Hence, option C is correct.