Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

31.

Which of the following is important source of edible protein?

  • Spirogyra

  • Porphyra

  • spirulina

  • Cephaleuros


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32.

The character found only in halophytes is

  • sunken stomata

  • vivipary

  • velamen tissue

  • heterophylly


B.

vivipary

Vivipary is the phenomenon of having seeds germinating within the fruit, eg, halophytes (mangrove plants).

Sunken stomata are found in xerophytes, heterophylly (occurrence of different kinds of leaves in a single plant) is found in hydrophytes, while velamen tissue is found in epiphytes.

Velamen provides a mechanical function protecting the vascular tissues in the root cortex, shielding the root from transpirational water loss. It also adhered the plant to the substrate.


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33.

Which one of the following is a pseudocarp ?

  • Apple

  • Guava

  • Tomato

  • Banana


34.

Largest moss is

  • Pogonatum

  • Funaria

  • Dawsonia

  • Polytrichum


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35.

The smallest free living organism is

  • virus

  • mycoplasma

  • diatom

  • cyanobacterium


36.

Name the fungus that is edible

  • Penicillium

  • Mucor

  • Rhizopus

  • Morchella


37.

Plant length is increased by

  • apical meristem

  • lateral meristem

  • dermarogen

  • periblem


38.

The mutagenic agent among following is

  • ethyl methane

  • ethylene

  • 2, 4-D

  • IAA


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39.

Inflammation response in allergy is caused by release of one of the following by mast cells

  • antigenes

  • histamine

  • immunogenes

  • immunoglobulin


40.

Phase of menstrual cycle when ovulation occurs in

  • luteal

  • menstural

  • proliferative

  • resting


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