All India Institute of Medical Sciences 2008 - Question Paper

b. Sugarcane and sunflower
c. Teak and pine
d. Deodar and fern
Sol. Secondary growth occurs in gymnosperms and dicots. accurate choice: (3)
Q.11. Which 1 of the subsequent statements about Mycoplasma is wrong?
a. They reason disease in plants
b. They are also called PPLO
c. They are pleomorphic
d. They are sensitive to penicillin
Sol. Mycoplasma is not sensitive to penicillin due to absence of cell wall. accurate choice: (4)
Q.12. In the prothallus of vascular cryptogam, the antherozoids and eggs mature at various times. As a result:
a. self fertilization is prevented
b. there is no change in success rate of fertilization
c. there is high degree of sterility
d. one can conclude that the plant is apomictic
Sol. In vascular cryptogam i.e. in pteridophytes gametophyte is monoecious but protandrous to avoid self fertilization. accurate choice: (1)
Q.13. 2 plants can be conclusively stated to belong to the identical species if they:
a. have identical number of chromosomes
b. can reproduce freely with every other and form seeds
c. have more than 90 per cent similar genes
d. look similar and possess identical secondary metabolities.
Sol. The members of a species are inter-fertile and produce fertile offsprings. accurate choice: (2)
Q.14. If you are asked to classify the different algae into distinct groups, which of the subsequent characters you should choose?
a. Chemical composition of the cell wall
b. Types of pigments current in the cell
c. Nature of stored food materials in the cell
d. Structural organization of thallus.
Sol. The different algae are classified mainly on the kinds of pigments current in their cells. accurate choice: (2)
Q.15. Flagellated male gametes are current in all the 3 of which 1 of the subsequent sets?
a. Riccia, Dryopteris and Cycas
b. Anthoceros, Funaria and Spirogyra
c. Zygnema, Saprolegnia and Hydrilla
d. Fucus, Marsilea and Calotropis
Sol. The male gametes of bryophytes are biflagellete, and those of pteriodophytes are multiflagellate, other than Selaginella having biflagellate gametes. The male gametes of gymnosperms are non motile other than those of Cycas having multiciliate gametes. accurate choice: (1)
Q.16. In gymnosperms, the pollen chamber represents:
a. the microsporangium in which pollen grains develop
b. a cell in the pollen grain in which the sperms formed
c. a cavity in the ovule in which pollen grains are stored after pollination

Earning:   Approval pending.