Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

41.

Flavr savr variety of tomato is a

  • mutated form

  • somaclonal variety

  • transgenic crop

  • high yielding variety


42.

If the decomposers become extinct, the most severally affected would be

  • biomagnification

  • damage to nitrogen fixation

  • non-cycling of minerals

  • carnivores will be starved


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43.

Which of the following is false?

  • The energy content in a trophic level is determined by considering individuals of a species in that trophic level

  • The succession that occur in newly cooled lava is called primary success

  • Rate of succession is faster in secondary succession

  • Quantity of biomass in a trophic level at a particular period is called as stop-(standing) crop


A.

The energy content in a trophic level is determined by considering individuals of a species in that trophic level

The energy level in a trophic level is not determined by considering individuals of a species in that trophic level.


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44.

Ratio between mortality and natality is called

  • population ratio

  • vital index

  • census ratio

  • density coefficient


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45.

What is not true about alleles?

  • Round and wrinkled form of genes are alleles of each other

  • Only recessive alleles expreses in hybrid

  • Alleles occupy same loci on homologous chromosomes

  • Two or more alternative forms of gene are called alleles are allelomorphs


46.

In Mendelian monohybrid cross, phenotypic ratio in F2 is 3 :1. How many types of gametes are formed in F1 -generation?

  • Two types

  • Four types

  • Eight types

  • Only one types


47.

Mendel enunciated

  • two principles of inheritance

  • four principles of inheritance

  • five principles of inheritance

  • three principles of inheritance


48.

Match the following columns

Column I Column II
A. Zoophily 1. Pollination by birds
B. Ornithophily 2. Pollination by insects
C. Entomophily 3. Pollination by bats
D. Chiropterophily 4. Pollination by animals

  • A - 4; B - 1; C - 2; D - 3

  • A - 1; B - 2; C - 3; D - 4

  • A - 3; B - 2; C - 1; D - 4

  • A - 4; B - 2; C - 1; D - 3


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49.

The scutellum observed in a grain of wheat or maize is comparable to which part of the seed in other monocotyledons?

  • Endosperm

  • Cotyledon

  • Plumule

  • Aleurone layer


50.

Which of the following codons does not select any amino acid?

  • UAG

  • UAA

  • UGA

  • All of these


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