Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

71.

During ecological succession

  • the gradual and predictable change in species composition occurs in a given area.

  • the establishment of a new biotic community is very fast in its primary phase.

  • the number and types of animals remain constant.

  • the number and types of animals remain constant.

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72.

The UN conference of Parties on climate change in the year 2012 was held at

  • Durban

  • Doha

  • Lima

  • Lima

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73.

Which one of the following events in not associated with ovulation in human female?

  • Decrease in oestradiol

  • Full development of Graafian follicle

  • Release of secondary oocyte

  • Release of secondary oocyte

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74.

Most animals that in deep oceanic water are

  • primary consumers

  • secondary consumers

  • tertiary consumers

  • tertiary consumers

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75.

If you suspect major deficiency of antibodies in a person, to which of the following would you look for confirmatory evidence?

  • Fibrinogin in plasma

  • Serum albumins

  • Haemocytes

  • Haemocytes

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76.

Increase in concentration of the toxicant at successive tropic levels is known as 

  • biomagnification

  • biodeterioration

  • biotransformation

  • biotransformation


A.

biomagnification

Biomagnification is the sequence of processes in an ecosystem by which higher concentrations of a particular toxicant, such as the pesticide or heavy metal are reached in higher organisms of the food chain, generally through a series of prey-predator relationships. 

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77.

Coconut water from a tender coconut is

  • Immature embryo

  • Free nuclear endosperm

  • Innermost layers of the seed coat

  • Innermost layers of the seed coat

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78.

Which of the following layers in an antral follicle is acellular?

  • Granulosa

  • Theca interna

  • Stroma

  • Stroma

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79.

The introduction of t-DNA into plates involves

  • Infection of the plant by agrobacterium tumefaciens

  • Altering the pH of the soil, then heat-shocking the plants

  • Exposing the plates to cold for a brief period

  • Exposing the plates to cold for a brief period

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80.

The DNA molecule to which the gene of interest is integrated for cloning is called

  • Transformer

  • Vector

  • Template

  • Template

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