A sponge harmful to oyster industry is from Biology NEET Year 20

Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

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1.

A sponge harmful to oyster industry is

  • Cliona

  • Euspongia

  • Hyalonema

  • Spongilla


A.

Cliona

Boring sponges, such as Cliona, attach themselves to shells of oysters, clams, barnacles etc, boring them so full of holes that their contained animals are destroyed and in time, the shells are entirely broken up. Lime of these shells gets dissolved into sea water to be used over again by other animals. Sometimes, these boring sponges may prove great nuisance to oyster beds.


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2.

During meiosis crossing over occurs at

  • pachytene

  • zygotene

  • leptotene

  • diakinesis


3.

The reabsorption of water in the kidney is under the control of

  • LH

  • ADH

  • STH

  • ACTH


4.

In sea anemone, the symmetry is

  • radial

  • bilateral

  • spherical

  • absent


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5.

Which of following organ can be called a sort of "blood bank" ?

  • Heart

  • Spleen

  • Liver

  • Lungs


6.

The vital capacity of human being is about

  • 1200 mL

  • 4800 mL

  • 2400 mL

  • 3600 mL


7.

The hormone which stimulates constriction of gall bladder

  • gastrin

  • secretin

  • glucagon

  • cholecystokinin


8.

Which vitamin should not be stored ?

  • Calciferol

  • Retinal

  • Niacin

  • Ascorbic acid


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9.

Eustachian canal connects

  • middle ear with external ear

  • middle ear with internal ear

  • external ear with internal ear

  • pharynx with middle ear


10.

A man of 'A' blood group marries a woman of 'AB' blood group, which type of progeny would indicate that man is heterozygous ?

  • O

  • B

  • A

  • AB


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