Free Biodiversity and Variety of Life MCQs with Answers

901. The body of_ consists of segments called Proglottids, which contain mainly sex organs.

• A. Planaria
• B. Fasciola
• C. Ascaris
• D. Tapeworm

Explanation: The major part of the tapeworm is called strobila and it consists of seginents, proglottids. They each contain both male and female reproductive organs.

902. Snails are the intermediate hosts in:

• A. Fasciola hepatica
• B. Schistosoma
• C. Taenia solium
• D. Ancylostoma duodenale

Explanation: Snails are the intermediate hosts of Fasciola hepatica.

903. _is an intestinal parasite of man belonging to phylum Nematoda.

• A. Taenia solium
• B. Ascaris lumbricoides
• C. Tucheront abaneroli
• D. Schistosoma

Explanation: Ascaris lumbricoides worms inhabit the lumen of the small intestine of human and pig.

904. The larva formed during the life cycle of Annelida is:

• A. Glochidium larva
• B. Bipinnaria larva
• C. Trochophore larva
• D. Tornaria larva

Explanation: Trochophore, also called trochosphere, small, translucent, free-swimming larva characteristic of marine annelids and most groups of mollusks.

905. Platyhelminthes are:

• A. Bilaterally symmetrical and diploblastic
• B. Bilaterally symmetrical and triploblastic
• C. Radially symmetrical and triploblastic
• D. Radially symmetrically and diploblastic

Explanation: Platyhelminthes have the following important characteristics: They are triploblastic, acoelomate, and bilaterally symmetrical. They may be free-living or parasites.The body has a soft covering with or without cilia.Their body is dorsoventrally flattened without any segments and appears like a leaf.

906. Birds do not have teeth so the function of teeth is performed by:

• A. Beak
• B. Pharynx
• C. Stomach
• D. Gizzard

Explanation: Birds do not have teeth Birds "chew" their food in their gizzard.

907. Which of them is not poikilotherm?

• A. Spiny anteater
• B. Lizard
• C. Crocodile
• D. Snake

Explanation: A poikilotherm is an animal whose internal temperature varies considerably. It is the opposite of a homeotherm, an animal which maintains thennal homeostasis. Spiny ant eaters belong to homeotherm.

908. Opossum and koala bear belongs to the sub-class:

• A. Prototheria
• B. Eutheria
• C. Metatheria
• D. Monotremata

Explanation: Metatheria includes marsupials that possess a pouch and give birth to partially-developed young ones. Well-known marsupials include kangaroos, wallabies, koalas, opossums, woinbats, Tasmanian devils, and the extinct Thylacme.

909. The table shows some characteristics of four different vertebrates. Which vertebrate is a reptile?

• A. A
• B. B
• C. C
• D. D

Explanation: Characteristics of Reptiles:✓ Reptiles are four-legged vertebrate animals.✓ Most reptiles lay eggs.The skin of reptiles is covered with scales. ✓ Reptiles have cold-blooded metabolisms. ✓ Reptiles breathe with the aid of lungs.

910. All chordates share these features except:

• A. Notochord
• B. Gill slits
• C. Post anal tail
• D. Vertebral column

Explanation: Vertebral column is present only in vertebrates.