Animal Kingdom

Class 11th Biology – 4 Animal Kingdom MCQs

The reproductive characters of Hemichordates resemble that of

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Phylum Echinodermata. The Hemichordates are dioecious and development show larval stages. Option A - Platyhelminthes are monoeciuos and development may show many larval stages. Option B - Annelids are monoecious except Nereis and some show larval stages. Option D - Coelenterata are monoecious and show larval stages. Some forms show two morphological phases for asexual and sexual reproduction.

Which one of the following have the highest number of species in nature ?

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In nature insects have the highest number of species (30 millions). Fungi have 100,000, angiosperms have 260000 and birds have 10,000 species.

Insects have

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Class insects have 3 pairs of legs located on the thoracic segments. It is the characteristic feature of class Insecta.

The characteristic features of Nereis that distinguishes them from other Annelids are _____

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Presence of different sexes or being Dioecious. Options A, B and C are characters that are also found in certain other Annelids.

The defensive cells of the phylum Coelenterata are known as ____

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"Option A The stinging cells of Coelenterates are cnidocytes or stinging cells.The immature cnidocyte is called cnidoblast. Option B Nematocyst are the stinging capsule inside the cnidocytes of Coelenterates. Option C Choanocytes are the collar cells lining the ostia of the Poriferans. Option D Comb plates are lined with cilia for locomotion in Ctenophorans."

Which of the following animal is diplobalstic in nature

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Hydra vulgaris. The two embryonal layers or germinal layers of an animal is known as the outer ectoderm and an inner endoderm. The various organs develop from these two embryonal layers. A is a protozoan, so made up of one cell. B is a triploblastic animal, it has three germinal layers. D is triplobalstic organim, with three germinal layers.

In desert grasslands which type of animals are relatively more abundant?

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Fossorial are the animals which live beneath the soil (in low temperature) and are found abundant in desert grasslands.

Metamorphosis of insects is regulated through hormone

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Metamorphosis of insects is regulated through ecdysone hormone.

The digestive system of the birds unlike mammals have additional organs namely ________ and __________.

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Crop and gizzard. Birds have a large crop before the stomach for storing the food and does not help in digestion. The gizzard is highly muscular and along with grit and tiny gravel help to physically breakdown the High food and grind them for further digestion. Option A, B and C are organs not exclusive for Aves.

Which of the following is present in man but absent in frogs ?

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Salivary gland is present in man because digestion starts in buccal cavity. It is absent in frog.

Which of the following is closest relative of man ?

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Dance pattern in honey bees is for

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Earnest Spytzner was first to draw attention to th fact that bees communicate by means of definite movements now called "bee dances".

The modern man differs from the apes in

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The modern man differs from the apes in having arms shorter than legs.

Balanoglossus is known as Acorn worm because

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The proboscis is shaped like an acorn. Acorns are conical-shaped fruits of the oak. The anterior proboscis with the collar in Balanoglossus looks like an acorn, especially when the body is found buried in the shore with coloured and protruding proboscis. Options A, B and C are incorrect.

Which of the following is not found in birds ?

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In birds, forelimbs are modified as wings for flying. Therefore , the forelimb is not found in birds.

Bull Frog of India is

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Rana tigrina - Bull frog ; Order - Anura Amphibia

Sponges are characterized by

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Silk thread is obtained fom silk moth during

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Caterpillar larva is a varacious eater, it gets matured and by secreting silk thread changes into pupa & it encloses into silk cocoon.

A common characteristic of all vertebrates is

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Vertabrates are also known as Craniata due to presence of skull in all its members.

Skin is a respiratory organ in

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Skin infact is a secondary or accessory respiratory organ in frog when frog undergoes the hibernation or aestivation i.e., winter sleep or summer sleep & when it goes into the water for a long period.

The process ecdysis observed in Arthropods refers to

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Shedding off the chitinous cuticle. The Arthropods have an exoskeleton made of chitin for defense, protection and to withstand dry conditions. The High structure of the exoskeleton restricts the animal's growth. This is overcome by periodic shedding of the chitinous cuticle and laying of new ones after their growth. This process of shedding or moulting is known as ecdysis. Option A -Metamorphosis refers to indirect development of the young ones in certain Arthropods. Option C-Sensing vibrations by organs known as anal cerci found in cockroach. Option D-Sensing chemicals in food is by antennae or feelers in Arthropods.

Spider web is formed by a fluid secreted by its

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Abdomen of spiders contains silk gland which spin silk for many purposes including formation of spider web for capturing the prey.

Bone marrow is absent in

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Birds are having pneumatic/membranous bones so bone marrow is absent in them.

The endoskeleton of Porifera and the exoskeleton of certain Cnidarians are respectively formed of ____, _____.

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Spongin in Poriferans and calcareous shell in certain Cnidarians like Corals. Options A, C and D-Bones and Cartilage are found in Chordates. A-Chitin is found in Arthropods and in cell wall of fungi. Option C- siliceous deposit is found in Diatoms(phytoplanktons). D- Horny scales are found in Reptiles.

The mantle cavity of a bivalve Mollusc is the region between

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The visceral hump and the spongy layer. The soft spongy layer found above the visceral hump is the mantle and the region between the two is the mantle cavity. The gills are present in the mantle cavity. Options B, C and D are parts of the bivalve molluscs but do not refer to the mantle cavity.

The repetition of body parts of an animal along the longitudinal axis of the body to produce a series of similar units is known as

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Metamerism refers to the repetition of body parts of an animal along the longitudinal axis of the body to produce a series of similar units as seen in earthworm.Option A-Metamorphosis is a phase in the life history of many animals during which there is a rapid transformation from the larval to the adult form.Option C-Metastasis is the spread of cancer from one part to another of the body.Option D-Metagenesis is the production of asexual and sexual organisms in alternate generations.

Which one is not correct?

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Whale are Ureotelic.

Radially symmetrical organisms have

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Radially symmetrical organisms have numerous planes of symmetry.They are divisible into many mirror images by cutting through any plane but through the centre. Option B is not Possible.Option C is bilateral symmetry, where it is divisible into two equal halves by cutting through one plane only. Option D is asymmetrical or no symmetry.

The notochord is present in the _________ of Ascidia.

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Larva. Ascidia belong to Urochordates in which the notochord develops in the tail of the larva but is lost in the adult stage. Options A and B - Ascidians are hermaphrodites. Option D - Notochord is not persisent in Ascidia.

Class 11th Biology - 4 Animal Kingdom MCQs
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