Diversity of Living World

 

Diversity of Living World

1. Which of the following are found in extreme saline conditions?

a. Archaebacteria

b. Eubacteria

c. Cyanobacteria

d. Mycobacteria

2. Select the mismatch

a. Frankia                       Alnus

b. Rhodospirillum          Mycorrhiza

c. Anabaena                    Nitrogen fixer

d. Rhizobium                   Alfalfa

3. Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survive without oxygen?

a. Bacillus

b. Pseudomonas

c. Mycoplasma

d. Nostoc

4. Read the following statements ( A to E ) and select the option with all correct statements

A. Mosses and Lichens are the first organisms to colonise a bare rock.

B. Selaginella is a homosporous pteridophyte.

C. Coralloid roots in Cycas have VAM.

D. Main plant body in bryophytes is gametophytic, whereas in pteridophytes it is sporophytic.

E. In gymnosperms, male and female gametophytes are present within sporangia located on sporophyte.

a. B, C and E

b. A, C and D

c. B, C and D

d. A, D and E

5. An example of colonial alga is

a. Chlorella

b. Volvox

c. Ulothrix

d. Spirogyra

6. Five kingdom system of classification suggested by R.H. Whittaker is not based on

a. Presence or absence of a well defined nucleus

b. Mode of reproduction

c. Mode of nutrition

d. Complexity of body organisation

7. Mycorrhizae are the example of

a. Fungitasis

b. Antibiosis

c. Amensalism

d. Mutualism

8. Which of the following shows coiled RNA strand and capsomeres?

a. Polio virus

b. Tobacco mosaic virus

c. Measles virus

d. Retrovirus

9. Viroids differ from viruses in having :

a. DNA molecules with protein coat

b. DNA molecules without protein coat

c. RNA molecules with protein coat

d. RNA molecules without protein coat

10. Select the mismatch

a. Pinus — Dioecious

b. Cycas — Dioecious

c. Salvinia — Heterosporous

    d. Equisetum — Homosporous

11. Life cycle of Ectocarpus and Fucus respectively are

a. Haplontic, Diplontic

b. Diplontic, Haplodiplontic

c. Haplodiplontic, Diplontic

d. Haplodiplontic, Halplontic

12. Zygote meiosis is characterisitic of

a. Marchantia

b. Fucus

c. Funaria

d. Chlamydomonas

13. Which of the following is correctly matched for the product produced by them?

a. Acetobacter acetic : Antibiotics

b. Methanobacterium : Lactic acid

c. Penicillium notatum : Acetic acid

d. Saccharomyces cerevisiae : Ethanol

14. Which of the following components provides sticky character to the bacterial cell?

a. Cell wall

b. Nuclear membrane

c. Plasma membrane

d. Glycocalyx

15. Which of the following statements is wrong for viroids?

a. They lack a protein coat

b. They are smaller than viruses

c. They causes infections

d. Their RNA is a high molecular weight

16. In bryophytes and pteridophytes, transport of male gametes require

a. Wind

b. Insects

c. Birds

d. Water

17. How many organisms in the list below are autotrophs?

Lactobacillus, Nostoc, Chara, Nitrosomonas, Nitrobacter, Streptomyces, Saccharomyces, Trypanosoma, Porphyra, Wolffia

a. Four

b. Five

c. Six

d. Three

18. Which of the following would appear as the pioneer organisms on bare rocks?

a. Lichens

b. Liverworts

c. Mosses

d. Green algae

19. Monoecious plant of Chara shows occurrence of

a. Stamen and carpel on the same plant

b. Upper antheridium and lower oogonium on the same plant

c. Upper oogonium and lower antheridium on the same plant

d. Antheridiophore and archegonio-phore on the same plant

20. Read the following five statement (A-E) and answer as asked next to them

a. In Equisetum, the female gametophyte is retained on the parent sporophyte

b. In Ginkgo, male gametophyte is not independent

c. The sporophyte in Riccia is more developed than that in Polytrichum

d. Sexual reproduction in Volvox is isogamous

e. The spores of slime moulds lack cell walls

How many of the above statement are correct?

a. Two

b. Three

c. Four

d. One

21 One of the major components of cell wall of most fungi is

a. Chitin

b. Peptidoglycan

c. Cellulose

     d. Hemicellulose

 

22. Which one of the following statements is wrong?

a. Cyanobacteria are also called blue-green algae

b. Golden algae are also called desmids

c. Eubacteria are also called false bacteria

d. Phycomycetes are also called algal fungi

23. Flagellated male gametes are present in all the three of which one of the following sets?

a. Riccia, Dryopteris and Cycas

b. Anthoceros, Funaria and Spirogyra

c. Zygnema, Saprolegnia and Hydrilla

d. Fucus, Marsilea and Calotropis

24. Ectophloic siphonostele is found in

a. Adiantum and Cucurbitaceae

b. Osmunda and Equisetum

c. Marsilea and Botrychium

d. Dicksonia and maiden hair fern

25. Which part of the tobacco plant is infected by Meloidogyne incognita?

a. Flower

b. Leaf

c. Stem

d. Root

26. Select the correct statement

a. Gymnosperms are both homosporous and heterosporous

b Salvinia, Ginkgo and Pinus all are gymnosperms

c. Sequoia is one of the tallest trees

d. The leaves of gymnosperms are not well adapted to extremes of climate

27. Seed formation without fertilization in flowering plants involves the process of

a. Sporulation

b. Budding

c. Somatic hybridization

d. Apomixis

28. Chrysophytes, Euglenoids, Dinoflagellates and Slime moulds are included in the kingdom

a. Animalia

b, Monera

c. Protista

d. Fungi

29. The primitive prokaryotes responsible for the production of biogas from the dung of ruminant animals, include the

a. Halophiles

b. Thermoacidophiles

    c. Methanogens

    d. Eubacteria