Tag: biology

Questions Related to biology

Radius is bone of

biology body movements gait of animals basics of joints joints and type of joints skeleton, joints and muscles

  1. Arm

  2. Leg

  3. Pelvic girde

  4. Cranium

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Correct Option: A
Explanation:
  • The bones of the arm or forelimb are humerus, radius and ulna, carpals (wrist bones – 8 in number), metacarpals (palm bones – 5 in number) and phalanges (digits – 14 in number).
  • Hence radius is bone of arm.
  • So, the correct answer is 'Arm'.

Ulna is a

biology body movements gait of animals basics of joints joints and type of joints skeleton, joints and muscles

  1. Long and curved bone

  2. Small slender bone

  3. Very small bone

  4. Very long bone

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Correct Option: A
Explanation:
  • The bones of the hand (forelimb) are humerus, radius and ulna, carpals (wrist bones – 8 in number), metacarpals (palm bones – 5 in number) and phalanges (digits – 14 in number),
  • The ulna is a long and curved bone.
  • Proximally, the ulna articulates with the humerus at the elbow joint. Distally, the ulna articulates with the radius, forming the distal radio-ulnar joint.
  • So, the correct answer is 'Long and curved bone'.

Acetabulum is formed at the point of fusion of bones

biology skeleton, joints and muscles gait of animals basics of joints joints and type of joints skeleton - movement and locomotion

  1. Ilium, Ischium

  2. lschium and pubis

  3. Ilium, pubis

  4. Ilium, Ischium, pubis

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Correct Option: D
Explanation:

There are three bones of the hip bone that come together to form the acetabulum. Two-fifths of the structure is the ischium, which provides lower and side boundaries to the acetabulum. The ilium forms the upper boundary, providing a little less than two-fifths of the structure of the acetabulum. The rest is formed by the pubis, near the midline.

So, the correct option is 'Ilium, Ischium, Pubis'.

In agriculture, .......... is used for weeding and plowing, .......... is used for weeding and sowing and ........... is used for harvesting of crops. Here the implements are respectively

biology modern agriculture modern equipments in agriculture soil quality methods of crop production

  1. Combine, seed drill and sickle

  2. Hoe, sickle and seed drill

  3. Cultivator, seed drill and sickle

  4. Hoe, seed drill and sickle

Show answer
Correct Option: A
Explanation:

1) In agriculture ploughing is process of turning up of the soil before sowing to increase the soil fertility.

  • This helps to turn organic matter in the soil to increase decomposition and add nutrients from the organic matter to the soil.
  • It is done using a plough.
2) Sowing is the process of planting, or sowing the seeds into the field.

  • It is done using seed drill.

3) Harvesting is the process of gathering a ripe crop from the fields.

  • Traditional tool used in harvesting was sickle, modern machine used in havesting is combine harvester.

.......... is the first step to be followed before growing a crop.

biology modern agriculture modern equipments in agriculture soil quality methods of crop production

  1. Preparation of soil

  2. Harvesting

  3. Weeding

  4. None of the above

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Correct Option: A
Explanation:

A.Preparation of soil - it is bed to grow or cultivate soil.

B.Harvesting - Cutting of plants in a crop.
C.Weeding - removal of weeds in a crop
So, the correct option is 'preparation of soil'.

Mulching is a process that helps in

biology modern agriculture modern equipments in agriculture soil quality methods of crop production

  1. Weed control

  2. Soil fertility

  3. Moisture conservation

  4. Improvement of soil structure

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Correct Option: C
Explanation:

Mulch is a protective layer of a material layered on top of soil. Mulch can be made of organic materials such as grass, straw, bark, etc. They can also be inorganic such as stones, brick pieces and plastic. Mulching prevents water evaporation from soil hence leads to moisture conservation. Thus, the correct answer is option C.

Which of the following wood is not used for making handle of spade? 

biology modern agriculture modern equipments in agriculture soil quality methods of crop production

  1. Sheesham

  2. Babool

  3. Neem

  4. Mango

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Correct Option: A
Explanation:
Sheesham is an expensive wood and an endangered species of wood trees. It is thus not easily available and thus cannot be used to make handles of tools. It is frequently used to make furniture but requires permission from the government because of the ban on the use of sheesham to protect the species.
All other trees are common trees and can be used to make the handle of a spade.
The correct answer is 'sheesham'.

Name the tool used for scraping of soil.

biology modern agriculture modern equipments in agriculture soil quality methods of crop production

  1. Hoe

  2. Plough

  3. Both A and B

  4. Cultivator

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Correct Option: C
Explanation:

(A) Hoe- It is a tool which is used for digging and weeding made of a thin metal blade and a long handle. It is also used to break up the surface of the ground.

(B) Plough- It is used by the farmers for cultivation of the soil, and for sowing seed and making furrows. It is made up of a blade at the end which digs the field for planting.
(D) Cultivator- It is used to prepare a proper seedbed for the crop to be buried in. It is also used for loosening the soil.
So, the correct option is 'Both A and B'.

Repeated ploughing increases the productivity of crops.
biology modern agriculture modern equipments in agriculture soil quality methods of crop production

  1. True

  2. False

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Correct Option: B
Explanation:

  • Repeated ploughing makes the soil turn several times and results in plough pan formation in cultivated soil due to the use of heavyweight tillage machinery. The land also loses nutrients from the soil and becomes a plough pan field.

So, the correct option 'False'.

Which among the following tools saves labour and time?

biology modern agriculture modern equipments in agriculture soil quality methods of crop production

  1. Hoe

  2. Cultivator

  3. Plough

  4. All of the above

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Correct Option: B
Explanation:

  • A cultivator is a type of farm implement used for secondary tillage. Nowadays, plowing is done by tractor driven cultivator which saves labor and time. 
Therefore, the correct answer is option B.