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51.

Which among the following is exclusively marine?A. PoriferaB. EchinodermataC. MolluscaD. Pisces

Answer» Correct Answer - B
Discussion
52.

Which among the following is exclusively marine?A. PoriferaB. EchinodermataC. MollusaD. Pisces

Answer» Correct Answer - B
Discussion
53.

Class is a category betweenA. phylum and orderB. kingdom and phylumC. order and familyD. family and genes

Answer» Correct Answer - A
Discussion
54.

A branch of biology which deals with the identification, nomeclature and classification of organisms is calledA. morphologyB. ecologyC. taxonomyD. phytogeography

Answer» Correct Answer - C
Discussion
55.

Basic taxonomic category isA. populationB. spicesC. varietyD. breed

Answer» Correct Answer - B
Discussion
56.

Which of the following is not a feature of monocots ?A. trimerous flowersB. fibrous root systemC. leaf with parallel venationD. secondary growth due to the presence of cambium

Answer» Correct Answer - D
Discussion
57.

Which of the following characteristics does not belong to following plants ?A. seeds are nakedB. conducting tissue is well developedC. shows nodes and internodesD. shows the presence of root hairs

Answer» Correct Answer - A
Discussion
58.

A student observed a prominent bond on 14,15 and 16 segment of earthworm, what is it known as ? A. peristomiumB. prostomiumC. clitellumD. mouth

Answer» Correct Answer - C
Discussion
59.

Which animal belongs to Annelida ?A. butterflyB. earthwormC. cockroachD. roundworm

Answer» Correct Answer - B
Discussion
60.

Which group of animals have segmented body ?A. ArthropodaB. NematodaC. AnnelidaD. Coelenterata

Answer» Correct Answer - C
Discussion
61.

Which of the following is a monocot ?A. carrotB. wheatC. mangoD. mustard

Answer» Correct Answer - B
Discussion
62.

Which of the following is parasitic protozoan ?A. AmoebaB. EntamoebaC. EuglenaD. Paramecium

Answer» Correct Answer - B
Discussion
63.

Phylum Chordata is named after the occurrence ofA. notochordB. dorsal hollow nerve cordC. occurrence of postnatal tailD. presence of gill slits

Answer» Correct Answer - A
Discussion
64.

In higher chordates, notochord is transformed intoA. craniumB. limbsC. vertebral columnD. both (b) and (c)

Answer» Correct Answer - C
Discussion
65.

Find out incorrect sentenceA. Protista includes unicellular eukaryotic organismsB. Whittaker considered cell structure, mode and sources of nutrition of classifying the organism in five kingdomsC. Both Monera and Protista may be autotrophic and heterotrophicD. Monerans have cell defined nucleus

Answer» Correct Answer - D
Monerans are prokaryotes.
Discussion
66.

How do gymnosperms and angiosperms differ from each other?

Answer» The gamnosperms bear naked seeds (i.e., the seeds are not enclosed within the fruits) wheras the angiosperms bear seeds inside the fruits.

Angiosperms

Gymnosperms
Flowering plants

Non-flowering plants

Seeds are enclosed within the ovary

Seeds are exposed on the surface of leaves, cones or scales
Seasonal

Evergreen

Triploid

Haploid
Leaves are flat

Leaves are needle-like with scales

Cotyledons are present

Cotyledons are absent
Hardwood plants

Softwood plants

Mostly rely on animals for pollination

Mostly rely on wind for pollination
Stigma and style are present

Stigma and style are absent

Distinct archegonia are present

Archegonia is absent
Double fertilization takes place

The fertilization is only generative type

These are a source of hardwood, pharmaceuticals, timber. fibre products, etc.

These are a source of softwood such as pine, fur, paper and plywood
Discussion
67.

Find the incorrect pairA. Leech - phylum AnnelidaB. Octopus - Phylum MolluscaC. Fasciola - phylum PlatyhelminthesD. starfish - phylum Chordata

Answer» Correct Answer - D
Discussion
68.

In angiospermsA. xylem possess vesselsB. phloem has sieve tubes and companionC. flowers are reproductive structuresD. all the above

Answer» Correct Answer - D
Discussion
69.

MammalsA. lay eggsB. possess body hairC. have a skin with scalesD. all the above

Answer» Correct Answer - B
Discussion
70.

The largest phylum of animalia isA. ArthropodaB. AnnelidaC. MollusaD. Cnidaria

Answer» Correct Answer - A
Discussion
71.

Refer following figures to answer the forthcoming practical questions A group of freely interbreeding organisms constituteA. familyB. genusC. speciesD. class

Answer» Correct Answer - C
Discussion
72.

Refer following figures to answer the forthcoming practical questions Which set of answer classifies the given organisms correctly ? A. Amphibia,Annelida,Nematoda,ArthropodaB. Annelida, Amphibia, Arthropoda, NematodaC. Arthropoda, Nematoda, Annelida, AmphibiaD. Nematoda, Annelida, Arthropoda, Amphibia

Answer» Correct Answer - D
Discussion
73.

Refer following figures to answer the forthcoming practical questions Which set of answer classifies the given organisms correctly ? A. `(i) Protisa (ii) Fungi (iii) Pteridophyta (iv) Thallophyta`B. `"(i) Fungi (ii) Pteridophyta (iii) Thallophyta (iv) Protista"`C. `"(i) Thallophyta (ii) Fungi (iii) Protista (iv) Pteridophyta"`D. `"(i) Protista (ii) Pteridophyta (iii) Thallophyta (iv) Fungi"`

Answer» Correct Answer - A
Discussion
74.

Refer following figures to answer the forthcoming practical questions Cell of bacteria containA. cell wallB. chromatin fibreC. both (a) and (b)D. may be (a) or (b)

Answer» Correct Answer - A
Discussion
75.

Features that help the bird to maintain constant body temperature :A. digitsB. pneumatic bonesC. wingsD. feathers

Answer» Correct Answer - D
Discussion
76.

In the following figures what is the common features ? A. presence of finsB. presence of scalesC. bulky thoraxD. post anal tail

Answer» Correct Answer - D
Discussion
77.

Which do you think is a more basic characteristic for classifying organisms? (a) the place where they live. (b) the kind of cells they are made of. Why?

Answer» The more basic characteristic for classifying organisms is the kind of cells they are made of because different organisms may share same habitat but may have entirely different from and structure. So, the place where they live cannot be a basis of classification.
Discussion
78.

What are the advantages of classifying organisms ?

Answer» Following are the advantages of classifying organisms:
`to` It makes us aware of and gives us information regarding the diversity of plants and animals.
`to` It makes the study of different kinds of organisms much easier.
`to` It tells us about the inter-relationship among the various organisms.
`to` It helps us understanding the evolution of organisms.
`to` It helps in the development of other life sciences easy.
`to` It helps enviromenalists to develop new methods of conservation of plants and animals.
Discussion
79.

What is the criterion for classification of organisms as belonging to kingdom Monera or Protista?

Answer» The organisms belonging to Kingdom Monera are unicellular and prokaryotic whereas the organisms belonging to Kingdom Protista are unicellular and eukaryotic.
Discussion
80.

On what bases are plants and animals put into different categories?

Answer» Plants and animals are put into different categories on the basis of Mode of nutrition. Plants are autotrophs. They can make their food own while animas are heterotrophs which are dependent on others for food. Also, locomotion, absence of chloraplasts etc. make them different.
Discussion
81.

Explain the basis for grouping organisms into five kingdoms.

Answer» Whittkar has based his scheme of classification of living organisms into five kingdom on four factors:
(i)Comlexity of cell structure : There are two broad categories of cell structure : Prokayotic and Eukaryotic. Thus, two broad groups can be formed- one having prokaryotic cell structure and the other having eukaryotic cell strcuture. Presence and absence of cell wall is another important charcteristics.
(ii) Unicellular and multicellular organisms: This characteristic makes a very basic distinction in the body designs of organisms and helps in their broad categorization.
(iii) Mode of nutrition : Organisms basically have type of modes of nutrition- Autotrophic (they can manufacture their own food) and Heterotrophic (i.e., obtian their food from external environment). Thus, they can be broady categorized into different gropus on the basic of the their modes of nutrition.
(iv) Phylogenetic relationship : Phylogney is the evolutionary history of an organism. It is believed that the simple organisms are primitive and complex organisms are advanced. Thus, primitive and advance nature of organisms also helps in their classification into broad groups. For example, the Monera are believed to have given rise to the Protista, from which the remaining three kindogms of multicellular organisms have evolved.
Discussion
82.

A very long sticky tonque and ability to change colour occurs inA. garden lizardB. chamaelonC. pythonD. king cobra

Answer» Correct Answer - B
Discussion
83.

Duck-billed platypus and echidna reA. reptilesB. egg-laying mammalsC. marsupial mammalsD. eutherian mammals

Answer» Correct Answer - B
Discussion
84.

Identify a member of PoriferaA. SpongillaB. EulenaC. PenicilliumD. Hydra

Answer» Correct Answer - A
Discussion
85.

Algae belong toA. ThallophytesB. bryophytesC. pteridophytesD. all of the above

Answer» Correct Answer - A
Discussion
86.

In which group of animals, coelom is filled with blood ?A. NematodaB. AnnelidaC. EchinodermataD. Arthropoda

Answer» Correct Answer - D
Discussion
87.

The group of animals having open circulatory system isA. ArthropodaB. NematodaC. AnnelidaD. Coelenterata

Answer» Correct Answer - A
Discussion
88.

Bryophytes are more evolved than algae because of theA. presence of sex organsB. unicellular root like structures to absorb some waterC. terrestrial habitatD. all of the above

Answer» Correct Answer - D
Discussion
89.

Chlorophyll containing, autotrophic thallophytes are calledA. algaeB. lichensC. fungiD. bryophytes

Answer» Correct Answer - A
Discussion
90.

The mole of nutrition in all fungi is characteriscallyA. symbioticB. autotrophicC. holozoicD. saprotrophic

Answer» Correct Answer - D
Discussion
91.

Fungi resemble animals in havingA. myceliumB. chitinC. glycogenD. both (b) and (c)

Answer» Correct Answer - D
Discussion
92.

Which of the following animals possesses a water vascular system ? A. IB. IIC. IIID. IV

Answer» Correct Answer - A
Discussion
93.

The compound plants composed of algae and fungi are calledA. algaeB. bryophytesC. pteridophytesD. lichens

Answer» Correct Answer - D
Discussion
94.

Which of the following plant group bears naked seeds ?A. PteridophytaB. BryophytaC. GymnouspermaeD. Angiospermae

Answer» Correct Answer - C
Discussion
95.

Which of the following group of plants is called vascular cryptogams ?A. thallophytaB. bryophytaC. pteridophytaD. angiospermae

Answer» Correct Answer - C
Discussion
96.

The correct position of clitellum in earthworm is :A. 12, 13, 14 segmentsB. 14, 15, 16 segmentsC. 24, 25, 26 segmentsD. 5, 6, 7 segments

Answer» Correct Answer - B
Discussion
97.

Unlabelled outline diagram of earthworm is drawn below. The important feature to be drawn and labelled for placing the earthworm in its phylum is : A. eyeB. clitellumC. annuliD. anus

Answer» Correct Answer - B
Discussion
98.

The kind of respiration shown by earthworm is :A. pulmonaryB. buccalC. through gillsD. cutaneous

Answer» Correct Answer - D
Discussion
99.

Scientific name of a frog is :A. Rana tigrinaB. Periplaneta americanaC. Musca domesticaD. Pheretima posthuma

Answer» Correct Answer - A
Discussion
100.

Pick the odd one out :A. warm blooded animals with a four chambered heartB. presence of hollow bonesC. give birth to young onesD. presence of strong flight muscles

Answer» Correct Answer - C
Discussion