Tag: zoology

Quizzes (289) Questions (5869)

Questions Related to zoology

Multiple choice zoology microbes in human welfare biofertilizers microbes as biocontrol agents and biofertilizers manuring

Identify the correct statement.

  1. Diatoms produce basidiospores

  2. Heterocysts occur in Nostoc

  3. Fronds develop in bryophytes

  4. Multiciliate sperms occur in angiosperms
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Nostoc is a cyanobacteria. It has ability to fix atmospheric nitrogen. It converts nitrogen into ammonia. The heterocysts present in it are specialized cyanobacterial cells for nitrogen fixation. It contains enzyme nitrogenase. Nitrogenase is inactivated by oxygen. Hence, the heterocyst creates a micro anaerobic environment.
Thus, the correct answer is 'Heterocysts occur in Nostoc.'
Multiple choice zoology soil pollution pollution of soil degradation of land damaging the forests

Which of these is not a sustainable agriculture technique?

  1. Mixed farming

  2. Slash and burn farming

  3. Crop rotation

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

Sustainable agriculture is the method of growing crops by using the technique without harming the environment. Slash and burn farming is not a sustainable agriculture technique as they increase the air pollution by release a large amount of carbon dioxide.

So, the correct answer is option B.

Multiple choice zoology soil pollution pollution of soil degradation of land damaging the forests

All of these are a result of land degradation except 

  1. Soil erosion

  2. Extinction of plant species

  3. Endangered animals

  4. Clear cutting forests

  5. Ozone depletion
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Land degradation is the loss in quality of natural land areas due to pollution.
A. Due to land degradation, there is deterioration in soil structure due to which soil particles can't bind to each other tightly. Hence there is soil erosion i.e. removal of upper fertile layer of soil due to flood, wind or any other natural calamity.
B. Due to land degradation, many plant species have become extinct because there is loss of soil nutrients which are essential for plants growth.
C. Animals are getting endangered as their habitat is also being lost due to land degradation.
D. Clear cutting of forests doesn't occur due to land degradation. It's the activity of mankind.
E. Ozone layer depletion occurs due to the halo compounds that are released from the degrading land.
Hence, clear cutting forests is not the result of land degradation.
So, the correct answer is 'Clear cutting forests'.
Multiple choice zoology soil pollution pollution of soil degradation of land damaging the forests

In which of the following agricultural practices is a part of a forest cleared for cultivation and then moving on to a new part for cultivation?

  1. Monoculture

  2. Mixed farming

  3. Field fallow

  4. Shifting cultivation
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Shift cultivation is a type of agricultural method in which farmer clears the land by burning forest and cultivate that land for short period of time. Once the soil becomes infertile farmer again clear the another land for cultivation. It is also called as jhum cultivation.

Multiple choice zoology soil pollution pollution of soil degradation of land damaging the forests

'Jhum' cultivation is also known as

  1. Terrace farming

  2. Tribal farming

  3. Shifting cultivation

  4. Farming on a slope
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Jhum (Shifting) cultivation is a primitive practice of cultivation in States of North Eastern Hill Region of India and people involved in such cultivation is called Jhumia. The practice involves clearing vegetative/forest cover on land/slopes of hills, drying and burning it before the onset of monsoon and cropping on it thereafter. After harvest, this land is left fallow and vegetative regeneration is allowed on it till the plot becomes reusable for the same purpose in a cycle. Meanwhile, the process is repeated in a new plot designated for Jhum cultivation during next year. Initially, when the Jhum cycle was long and ranged from 20 to 30 years, the process worked well.


So, the correct option is 'Option C'.

Multiple choice zoology soil pollution pollution of soil degradation of land damaging the forests

Shifting cultivation practised in India is called

  1. Sawani

  2. Jhum

  3. Harhi

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

Shifting cultivation, also known as the slash and burn agriculture (or Jhum cultivation), is the process of growing crops by first clearing the land of trees and vegetation and burning them thereafter. The burnt soil contains potash which increases the nutrient content of the soil. This burnt land is left for 5-8 years, so as to give the soil the time to regain its fertility . It was practised by the nomads in the north- eastern states of India .

So, the correct answer is 'Jhum'

Multiple choice zoology soil pollution pollution of soil degradation of land damaging the forests

Taungya is

  1. A method of shifting cultivation

  2. Type of agroforestry practice

  3. Protection forestry

  4. Both A and B
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Taungya is a system whereby villagers & sometimes forest plantation workers are given the right to cultivate agricultural crops during the early stages of forest plantation establishment 

So, the correct answer is 'Both A and B'

Multiple choice zoology natural resources and agriculture pollution of soil degradation of land damaging the forests

In India, Jhum is practised in

  1. Maharashtra

  2. Madhya Pradesh

  3. North-eastern states

  4. Himachal Pradesh
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Jhum cultivation, also known as the slash and burn agriculture, is the process of growing crops by first clearing the land of trees and vegetation and burning them thereafter. The burnt soil contains potash which increases the nutrient content of the soil. This burnt land is left for 5-8 years , so as to give the soil the time to regain its fertility . It was practised by the nomads in the north- eastern states of India .

So, the correct answer is 'North-eastern states'

Multiple choice zoology natural resources and agriculture pollution of soil degradation of land damaging the forests

The type of pollution which is found the third most is

  1. Land or landscape pollution

  2. Controlled tipping

  3. Noise pollution

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

The three main types of pollution are 1. Air Pollution 2. Water Pollution 3. Soil Pollution. Rapid urbanization, with the consequent increase in population and building construction, has resulted in the reduction of land for the wastes to be disposed of.

Every year solid wastes are increasing tremendously all over the world. Several hazardous chemicals and the mountains of wastes are ultimately dumped on the land. For example sources of soil, pollution is 
1. Industrial wastes, 2. Urban wastes, 3. Radioactive pollutants, 4. Agricultural practices, 5. Biological agents, 6. Soil sediments.
So the correct answer is 'Land or landscape pollution'.