Age of a tree can be estimated by from Biology NEET Year 2013 Fr

Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

1.

Select the wrong statement.

  • Isogametes are similar in structure, function and behaviour

  • Anisogametes differ either in structure, function and behaviour

  • In oomycetes female gamete is smaller and motile, while male gamete is larger and non-motile

  • Chlamydomonas exhibits both isogamy and anisogamy and Fucus shows oogamy


2.

Which one of the following is not a correct statement?

  • Herbarium houses dried, pressed and preserved plant specimens

  • Botanical gardens have collection of living plants for reference

  • A museum has collection of photographs of plants and animals

  • Key is a taxonomic aid for identification of specimens


3.

lsogamous condition with non-flagellated gametes is found in

  • Chlamydomonas

  • Spirogyra

  • Volvox

  • Fucus


4.

Besides paddy fields, cyanobacteria are also found inside vegetative part of

  • Pinus

  • Cycas

  • Equisetum

  • Psilotum


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5.

Read the following statements (IV) and answer the question which follows them

I. In liverworts, mosses and ferns gametophytes are free living.

II. Gymnosperms and some ferns are heterospores.

III. Sexual reproduction in Fucus, Volvox and Albugo is oogamous.

IV. The sporophyte in liverworts is more elaborate than that in mosses.

How many of the above statements are correct?

  • One

  • Two

  • Three

  • Four


6.

Among bitter gourd, mustard, brinjal, pumpkin, China rose, lupin, cucumber, sunnhemp, gram, guava, bean, chilli, plum, Petunia, tomato, rose, Withania, potato, onion, aloe and tulip, how many plants have hypogynous flower?

  • Six

  • Ten

  • Fifteen

  • Eighteen


7.

Interfascicular cambium develops from the cells of

  • medullary rays

  • xylem parenchyma

  • endodermis

  • pericycle


8.

In China rose the flowers are

  • actinomorphic, hypogynous with twisted aestivation

  • actinomorphic, epigynous with valvate aestivation

  • zygomorphic, hypogynous with imbricate aestivation

  • zygomorphic, epigynous with twisted aestivation


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9.

Lenticels are involved in

  • transpiration

  • gaseous exchange

  • food transport

  • photosynthesis


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10.

Age of a tree can be estimated by

  • its height and girth

  • biomass

  • number of annual rings

  • diameter of its heartwood


C.

number of annual rings

Age of a tree can be estimated by number of annual rings. The two kinds of woods that appear as alternate concentric rings, constitute an annual ring heartwood comprises dead elements with highly lignified walls that give mechanical support to the stem. The height and girth of a tree increases due to the activity of vascular cambium.


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