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Question 331

DMRC CRA 2020• General Science

Name the organ that controls the size of the pupil.

  1. AOption (a)

    Iris

  2. BOption (b)

    Retina

  3. COption (c)

    Eyeball

  4. DOption (d)

    Cornea

View answer & explanation

Correct answer

Answer: (a)A.

Iris

Explanation not yet available.

Question 332

DMRC CRA 2020• General Science

Air, water and soil provide total of __________ nutrients for plants to grow.

  1. AOption (a)

    61

  2. BOption (b)

    5

  3. COption (c)

    16

  4. DOption (d)

    60

View answer & explanation

Correct answer

Answer: (a)A.

61

Explanation not yet available.

Question 333

DMRC CRA 2020• General Science

In 2019, Ministry of Housing and Urban Affairs launched India's first 'Garbage Cafe' in Chhatisgarh. What does the concept involve?

  1. AOption (a)

    Poor and homeless people getting a meal in return of plastic waste

  2. BOption (b)

    The cafe being a zero-garbage cafe

  3. COption (c)

    The walls of the cafe being made with recycled garbage

  4. DOption (d)

    The employment of rag pickers by the cafe

View answer & explanation

Correct answer

Answer: (a)A.

Poor and homeless people getting a meal in return of plastic waste

Explanation not yet available.

Question 334

DMRC CRA 2020• General Science

The ______ is responsible for precision of voluntary action and maintaining the posture and balance of the body.

  1. AOption (a)

    Mid brain

  2. BOption (b)

    Fore brain

  3. COption (c)

    Cerebellum

  4. DOption (d)

    Cerebrum

View answer & explanation

Correct answer

Answer: (a)A.

Mid brain

Explanation not yet available.

Question 335

DMRC CRA 2020• General Science

Which of the following is NOT a group under Vertebrata?

  1. AOption (a)

    Pisces

  2. BOption (b)

    Mollusca

  3. COption (c)

    Aves

  4. DOption (d)

    Reptiles

View answer & explanation

Correct answer

Answer: (a)A.

Pisces

Explanation not yet available.

Question 336

DMRC CRA 2020• General Science

Which bio agent is used in making fertilisers?

  1. AOption (a)

    Blue green algae

  2. BOption (b)

    Earthworms

  3. COption (c)

    Cow dung

  4. DOption (d)

    Manure

View answer & explanation

Correct answer

Answer: (a)A.

Blue green algae

Explanation not yet available.

Question 337

DMRC CRA 2020• General Science

Under which kingdom those organisms come who show mutual dependency and live symbiotic life?

  1. AOption (a)

    Plantae

  2. BOption (b)

    Fungi

  3. COption (c)

    Animalia

  4. DOption (d)

    Monera

View answer & explanation

Correct answer

Answer: (a)A.

Plantae

Explanation not yet available.

Question 338

DMRC CRA 2020• General Science

Central Ground Water Board is a subordinate office of the _______.

  1. AOption (a)

    Ministry of Jal Shakti

  2. BOption (b)

    Irrigation department

  3. COption (c)

    Municipal Corporation

  4. DOption (d)

    Delhi Jal Board

View answer & explanation

Correct answer

Answer: (a)A.

Ministry of Jal Shakti

Explanation not yet available.

Question 339

DMRC CRA 2020• General Science

______ proved from his experiments that acceleration of a freely falling object is independent of its mass.

  1. AOption (a)

    Galileo Galilei

  2. BOption (b)

    Archimedes

  3. COption (c)

    Isaac Newton

  4. DOption (d)

    Robert Boyle

View answer & explanation

Correct answer

Answer: (a)A.

Galileo Galilei

Explanation not yet available.

Question 340

DMRC CRA 2020• General Science

_______ are tiny openings or pores on the surface of the plant leaves that allow gas exchange.

  1. AOption (a)

    Stomata

  2. BOption (b)

    Pores

  3. COption (c)

    Veins

  4. DOption (d)

    Chloroplast

View answer & explanation

Correct answer

Answer: (a)A.

Stomata

Explanation not yet available.