Multiple Choice Questions

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The ovary is half inferior in flowers of 

  • cucumber

  • cotton

  • guava

  • guava


D.

guava

If gynoecium is situated in the centre and other parts of the flowers are located on the rim of the thalamus almost at the same level, it is called perigynous. The ovary here is said to be half inferior, i.e, plum rose, peach, etc.

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When a neurone is a resting state, ie, not conducting any impulse, the axonal membrane is 

  • equally permeable to both Na+ and K+ ions

  • impermeable to both Na+ and K+ ions

  • comparatively more permeable to K+ ions and nearly impermeable to Na+ ions

  • comparatively more permeable to K+ ions and nearly impermeable to Na+ ions

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The cork cambium, cork and secondary cortex are collectively called

  • Phellogen

  • Periderm

  • phellem

  • phellem

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The curve given below shows enzymatic activity with relation to three conditions (pH, temperature and substrate concentration)

What do the two axises (X and Y) represent?


  • X –axis

    Y-axis

    Temperature

    Enzyme activity

  • X –axis

    Y-axis

    Substrate concentration

    enzymatic activity

  • X –axis

    Y-axis

    enzymatic activity

    temperature
  • X –axis

    Y-axis

    enzymatic activity

    temperature
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Uricotelic mode of passing out nitrogenous wastes is found in

  • birds and annelids

  • amphibians and reptiles

  • insects and amphibians

  • insects and amphibians

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Given ahead is n incomplete table about certain hormones, their source glands and one major effect of each on the body in humans. Identify the correct option for the three blanks A, B and C. 

Gland

Secretion

Effect on Body

A

Oestrogen

Maintenance of secondary sexual characters

Alpha cells of islets of Langerhans

B

Raise blood sugar level

Anterior pi- tuitary

C

Over secretion leads to gigantism

 
  • A

    B

    C

    Placenta

    Insulin

    Vasopressin

  • A

    B

    C

    Ovary

    Insulin Calcitonin
  • A

    B

    C

    Placenta

    Glucagon

    Calcitonin

  • A

    B

    C

    Placenta

    Glucagon

    Calcitonin

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One very special feature in the earthworm pheretima is that

  • the typhlosole greatly increases the effective absorption area of the digested food in the intestine

  • the S- shaped setae embedded in the integument are the defensive weapons used against the enemies

  • It has a long dorsal tubular heart

  • It has a long dorsal tubular heart

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Which one of the following is wrongly matched?

  • Puccinia - Smut

  • Root - Exarch protoxylem

  • Cassia - Imbricate aestivation

  • Cassia - Imbricate aestivation

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Which one of the following statements is correct with respect to kidney function regulation?

  • Exposure to cold temperature stimulates ADH release

  • An increase in glomerular blood flow stimulates formation of angiotensin II

  • During summer when body loses lot of water by evaporation, the release of ADH is suppressed

  • During summer when body loses lot of water by evaporation, the release of ADH is suppressed

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A prokaryoticv autotrophic nitrogen-fixing symbiont is found in 

  • Cycas

  • Cicer

  • Pisum

  • Pisum

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