Lakshya Education MCQs

Question: Crop variety improvement is done to achieve which of the following objectives?
Options:
A.Higher yield
B.Degraded quality of the agricultural products
C.Lesser resistance to insects
D.Lesser resistance to pests
Answer: Option A
: A

The main goals of crop variety improvement are:
i. higher yield
ii. improved quality
iii.change in maturity period
iv. wider adaptability
v. desirable agronomic (plant/crop) characteristics

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More Questions on This Topic :

Question 1. Which of the following elements can be obtained by plants directly from air?
  1.    Iron
  2.    Boron
  3.    Carbon
  4.    Calcium
Answer: Option C
: C

Plants take in carbon dioxide directly from the air. Thus, carbon and oxygen are obtained directly from theair.Iron, calcium and boron are supplied to the plants through the soil.
Question 2. Small storage reservoirs which intercept and store the run-off of small catchment area are called___.
  1.    Canals
  2.    Wells
  3.    Tanks
  4.    Watershed
Answer: Option C
: C

Small storage reservoirs which intercept and store the run-off of small catchment area are called tanks. Tanks are an important source of irrigation for far-flung villages. It acts as a artificial reservoirof any size.
Question 3. Crossing between two different species of the same genus is called interspecfic hybridisation.
  1.    True
  2.    False
  3.    Reduced tolerance to high temperature
  4.    Reduced tolerance against frost
Answer: Option A
: A

Crossing between two different species of the same genus is called interspecific hydridisation. It is one of the methods used to improve plant characteristics.
Question 4. Which of these is a foreign breed of cow?
  1.    Red Sindhi
  2.    Sahiwal
  3.    Jersey
  4.    Leghorn
Answer: Option C
: C

Foreign breeds of coware used for breeding with indigenous breeds primarily to produce a superior breed having better qualities such aslonglactation periods.Jersey andBrown Swissare some examples offoreign breeds.
Question 5. An abiotic factor which affects crop production is____.
  1.    pest
  2.    weed
  3.    temperature
  4.    bacteria
Answer: Option C
: C

The factors which influence crop production can be grouped into two types: biotic and abiotic. The factors which are related to living beings are called biotic factors. Non-living factorsare called abiotic factors. For example, salinity, temperature etc.
Question 6. Cross breeding programmes between indigenious and foreign breeds of farm birds is done to develop which of the following desirable characteristics?
  1.    Reduced number of chicks
  2.    Low maintenance requirements
  3.    Reduced tolerance to high temperature
  4.    Reduced tolerance against frost
Answer: Option B
: B

The cross-breeding programs between Indian and foreign breeds of birds are focused on developing following.
i)New varieties with increased number and quality of chicks.
ii) Increased tolerance to high temperature.
iii) Low maintenance.
iv) Reduction in the size of the egg-laying bird with ability to utilise more fibrous andcheaper diets formulated using agricultural by-products.

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