Tag: biology

Quizzes (1160) Questions (12174)

Questions Related to biology

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

Which of the methods of ploughing is mostly practised?

  1. Outside to inside ploughing

  2. Inside to outside ploughing

  3. Ploughing by putting furrow from one side of field

  4. Ploughing by halai making
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Ploughing is the method of sowing seeds, cutting furrows and turning the soil. It is done by the tool called plough. Ploughing by halai making is the method which is most practiced. It is the easiest method of ploughing.

So, the correct option is 'Ploughing by halai making'.

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

Conservation tillage is :

  1. Terrace tillage

  2. Reduced tillage

  3. No tillage

  4. Both B and C
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Conservation tillage is a tillage system that creates a suitable soil environment for growing a crop and that conserves soil, water and energy resources mainly through the reduction in the intensity of tillage, and retention of plant residues. The most important advantage of conservation tillage systems is significantly less soil erosion due to wind and water.  No tillage farming is a way of growing crops or pasture from year to year without disturbing the soil through tillage. No tillage is an agricultural technique which increases the amount of water that infiltrates into the soil, the soil's retention of organic matter and its cycling of nutrients. Reduced tillage  is a practice of minimising soil disturbance and allowing crop residue or stubble to remain on the ground instead of being thrown away or incorporated into the soil. In terracing, wide steps are cut around the slopes of hills to prevent soil erosion. Since, both reduced and no tillage indulge in soil and water conservation, same as the conservation tillage
So, the correct answer is 'Both B and C'
Multiple choice biology biogeochemical cycles carbon cycling mineral coal carbon cycle

Which one of the following statements regarding CO gas is correct ?

  1. It is produced by the complete combustion of fossil fuels.

  2. It combines with haemoglobin to form carbamino-haemoglobin.

  3. It impairs oxygen transport resulting in giddiness, headache, asphyxia and even death.

  4. All of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Carbon monoxide ( CO ) is produced due to incomplete combustion of fossil fuels, metallurgical operations, automobile emission, cigarette smoking. CO combines with haemoglobin, produces carboxyhaemoglobin which impairs oxygen transport resulting in headache, decreased vision, cardiovascular disease, asphyxia.

Multiple choice biology biogeochemical cycles carbon cycling mineral coal carbon cycle

If the carbon atoms fixed by producers already have passed through three species, the tropic level of the last species would be.

  1. Scavenger

  2. Tertiary producer

  3. Tertiary consumer

  4. Secondary consumer
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

If the carbon atoms fixed by producer already have passed through three species then the trophic level of the last species(i.e., third species) would be tertiary consumer.
Producers $\rightarrow 1^o$ consumers $\rightarrow 2^o$ consumers $\rightarrow 3^o$ consumers.

Multiple choice biology ecology carbon cycling mineral coal carbon cycle

Which of the following is the largest reservoir of carbon?

  1. Soil

  2. Atmosphere

  3. Ocean

  4. Sedimentary rocks
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In the ocean, there are underwater sediments and sediment rocks of carbonate like in the form of limestone, dolomite etc. Thus, the correct answer is option C.

Multiple choice biology ecology carbon cycling mineral coal carbon cycle

How does photosynthesis help to maintain the percentage of oxygen and carbon dioxide in the atmosphere?

  1. By giving off carbon dioxide and absorbing oxygen

  2. By giving off oxygen and absorbing carbon dioxide

  3. By releasing oxygen and carbon dioxide

  4. By absorbing oxygen and carbon dioxide.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

During photosynthesis, carbon dioxide is fixed to form carbohydrate by the dark reaction. The water molecules are broken down during the light reaction and release oxygen. Thus, the two process helps to maintain the balance of oxygen and carbon dioxide in the atmosphere.

So, the correct answer is option B.

Multiple choice biology ecology carbon cycling mineral coal carbon cycle

Biochemical cycle with gaseous phase is

  1. Carbon

  2. Sodium

  3. Phosphorus

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

Carbon is a gaseous cycle because it circulates through the atmosphere primarily as carbon dioxide. Elements like sodium, phosphorus, and magnesium are sedimentary cycles with no significant gaseous phase.

Multiple choice biology biogeochemical cycles carbon cycling mineral coal carbon cycle

Which of the following gases has role an important in maintaining atmospheric temperature?

  1. Nitrogen

  2. Oxygen

  3. Argon

  4. Carbon dioxide
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Carbon dioxide is a greenhouse gas that traps heat in the atmosphere, playing a critical role in maintaining the Earth's temperature. Nitrogen and oxygen are the primary components of air but do not have the same greenhouse effect.

Multiple choice biology biogeochemical cycles carbon cycling mineral coal carbon cycle

Major 'reservoirs' of $CO _{2}$ are:

  1. Land, water, plants

  2. Fossil fuel, soil, , oceans

  3. Volcanic Eruption

  4. Deforestation
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Carbon is stored in major reservoirs including the atmosphere, oceans, soil, and fossil fuels. These act as sinks or sources for carbon exchange.

Multiple choice biology biogeochemical cycles carbon cycling mineral coal carbon cycle

Affinity of hemoglobin for CO is two hundred times more considerable than

  1. $O _{2}$
  2. $CO _{2}$

  3. Sox

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

Carbon monoxide (CO) binds to hemoglobin with an affinity approximately 200 to 250 times greater than that of oxygen (O2), which is why CO poisoning is so dangerous.