Tag: commercial applications

Quizzes (170) Questions (1551)

Questions Related to commercial applications

Multiple choice commercial applications population - the increasing numbers and rising problem impact of depletion of natural resources population growth models depletion of resources

Choose the incorrect one.

  1. In logistic growth equation when N $<$ K then r $> 0$
  2. In logistic growth equation when N$=$K then r$=$constant
  3. In logistic growth equation N $>$ K then r $< 0$
  4. In logistic growth equation N $>$ K then r $> 0$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Answer is A. 
If N is very small compared to K, then the population growth rate will be a small positive number. This means the population is slowly getting larger because there are a few more births than deaths

Multiple choice commercial applications population - the increasing numbers and rising problem impact of depletion of natural resources population growth models depletion of resources

The concept that 'population tends to increase geometrically while food supply increases arithmetically was put forward by

  1. Adam Smith

  2. Charles Darwin

  3. Thomas Malthus

  4. Stuart Mill
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The concept that 'population tends to increase geometrically while food supply increases arithmetically were put forward by Thomas Malthus. In his theory of natural selection, Charles Darwin was greatly influenced by the English clergyman Thomas Malthus. Malthus published a book in 17981798 stating that populations with unlimited natural resources grow very rapidly, after which population growth decreases as resources become depleted. This accelerating pattern of increasing population size is called exponential growth.

So, the correct answer is 'Thomas Malthus'.

Multiple choice commercial applications population - the increasing numbers and rising problem impact of depletion of natural resources population growth models depletion of resources

A rancher moved his herd of cattle to a different pasture. Identify the correct statement which indicates that the carrying capacity of that pasture was exceeded, as per the given example.

  1. The herd increased in size.

  2. The pasture became overgrazed and barren.

  3. The pasture had more grasses.

  4. The cows gained weight.

  5. The cows had more calves.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Carrying capacity is the maximum size of the population of a species that a certain environment can support for an extended period of time. Once population overshoots the carrying capacity, it starts decreasing as at this point, the different environmental resistances start operating and population dies because of the struggle for existence. Among the given options, option B shows that carrying capacity of pasture was exceeded turning it into the barren land. The increase in grasses or weight gain of cow suggests growth of grassland.

Therefore, the correct answer is option B.

Multiple choice commercial applications population - the increasing numbers and rising problem impact of depletion of natural resources population growth models depletion of resources

Sigmoid /logistic growth curve is represented by

  1. dN/dt=rN

  2. dN/dt=rN(1-N/K)
  3. $N _t=N _0+B+I-D-E$

  4. dN/dt=1-N/K
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The logistic growth equation is dN/dt = rN(1 - N/K), where r is the intrinsic rate of increase, N is population size, and K is carrying capacity.

Multiple choice commercial applications receding water table water and ocean conservation water resources and conservation water conservation and irrigation

Why do we celebrate water day every year?

  1. We celebrate water day every year to attract the attention of everybody towards the importance of conserving water.

  2. It is a tradition.

  3. It is for commercial purposes.

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
World water day is celebrated every year on 22nd March. Water is essential for life on earth. The water available for consumption on earth is limited. Only 3% of the water on earth is freshwater. All lakes, rivers and swamps combined include a very small part that is 0.3% of the earth's total freshwater reserves. Hence water should be used judiciously. So water day is celebrated every year to attract the attention of everybody towards the importance of conserving water.
Thus, the correct answer is option A.
Multiple choice commercial applications receding water table water and ocean conservation water resources and conservation water conservation and irrigation

Why earth appears blue from the space?

  1. About 71% of the earths surface is covered with water which gives blue colour to earth.

  2. Earth is covered with blue air.

  3. Earth is covered with blue coloured mountains and rocks.

  4. All of the above.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • The earth is predominantly (71 % of the earth's surface) covered with water. Water absorbs the white light in the radiation (sunlight). The sunlight through appears white it is actually a combination of lights of several different colors (Violet, indigo, blue, green, yellow, orange and red). 
  • When sunlight reaches the water; the water absorbs, lights of all colors in the white light and reflects only blue light. Thus, the earth from space appears blue. If the water absorbs all colors and reflects only yellow, then it would appear yellow.
Multiple choice commercial applications receding water table water and ocean conservation water resources and conservation water conservation and irrigation

Which of the following can be used to conserve water in homes?

  1. Composting toilets

  2. Rainwater harvesting

  3. Automatic faucet

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Water-saving technology for the home includes:

  • Low-flush toilets and composting toilets. These have a dramatic impact in the developed world, as conventional western toilets use large volumes of water. 
  • Rainwater harvesting high-efficiency clothes washers weather-based irrigation controllers garden hose nozzles that shut off water when it is not being used, instead of letting a hose run. Low flow taps in wash basins. 
  • Automatic faucet is a water conservation faucet that eliminates water waste at the faucet. It automates the use of faucets without the use of hands.