Tag: evs

Quizzes (439) Questions (4580)

Questions Related to evs

Multiple choice evs economic importance of plants and animals manure manures and fertilisers role of organic manures in soil management

A crop plant which can grow in nitrogen deficient soils without external supply of it is?

  1. Allium sativum

  2. Gossypium herbaceum

  3. Cajanus cajan

  4. Helianthus annus
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Cajanus cajan, commonly known as pigeon pea, is a legume. Legumes have a symbiotic relationship with nitrogen-fixing bacteria in their root nodules, allowing them to thrive in nitrogen-deficient soils.

Multiple choice evs economic importance of plants and animals manure manures and fertilisers role of organic manures in soil management

Which of the following plants is used to extract the blue dye?

  1. Trifolium

  2. Indigofera

  3. Lupin

  4. Cassia
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
The name of the plant is Indigofera tinctoria , which is under the family fabaceae.  This plant is used to produce blue denim jeans. On average a single pair of blue denim jeans need 3-12 gram of indigo.

This plant is required to do dye wool and silk products. This plant is normally found in tropical area. Indigo is very safe for the human skin and it is also chemical free.
Correct answer is B.
Multiple choice evs economic importance of plants and animals manure manures and fertilisers role of organic manures in soil management

_____________ is a practice of clearing and burning the forest area for cultivation of crops for 3-4 years and shifting.

  1. Jhum cultivation

  2. Horticulture

  3. Taungya cultivation

  4. Agrisilviculture
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Jhum cultivation, also known as slash-and-burn agriculture, involves clearing forest patches by cutting and burning vegetation to create temporary fields for crop cultivation.

Multiple choice evs agriculture- crops manure manures and fertilisers role of organic manures in soil management

In high yielding `hybrid crop varieties', to exploit hybrid vigour, the farmers need to purchase fresh hybrid seed every year, because

  1. They are not allowed to grow their own seed

  2. The hybrid vigour is lost due to inbreeding depression

  3. The government of India has accepted Dunkel's proposals

  4. It is cheaper to purchase fresh seed
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Hybrid seeds are the result of crossing two genetically distinct inbred lines. If seeds from these hybrids are saved and replanted, the offspring show segregation, leading to a loss of the uniform, high-performing traits known as hybrid vigour.

Multiple choice evs likes and dislikes genetics terminology similarities and dissimilarities in organisms features of human body and sign language

What is/are the main difference between human and animal?

  1. Height

  2. Weight

  3. Brain

  4. All of above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  • The main difference between animals and humans is the brain.
  • The main function of the brain is to think and to decide what is right and what is wrong. 
  • This is the only difference by which humans can think and take decisions.
    Hence, the correct answer is C.