Tag: botany

Questions Related to botany

The product of ecosystem processes which have environmental, asthetic and indirect economic value is called as

  1. Ecosystem services

  2. Biosphere services

  3. Environmental services

  4. None of the above


Correct Option: A

In an ecosystem which of the following are important components?

  1. Energy flow and food chain

  2. Mineral recycling and energy flow

  3. Food chain and decomposers

  4. All of the above


Correct Option: D
Explanation:

Any ecosystem has two components -biotic or living organisms and abiotic or non-living component. 

Further, two most important functional characteristics of any ecosystem are unidirectional flow of energy and cycling of material. The living organisms of an ecosystem are related through food chains, which gives rise to trophic levels in an ecosystem. Energy is transferred from one trophic level to the next through the food chains. 
Of all the organisms in an ecosystem, the most important role is played by decomposers. The nutrients are released back into the environment by the decomposition of dead organisms. Thus, the correct answer is option D.

Valuable, practical services that help to preserve ecosystem performed by nature are called

  1. Ecosystem service

  2. Biological control

  3. The green house effect

  4. Biosphere balancing


Correct Option: A

Which one of the following is the most stable ecosystem?

  1. Forest

  2. Mountain

  3. Desert

  4. Ocean


Correct Option: D

One way flow of energy through an ecosystem continuous in

  1. Biological System

  2. Chemical process

  3. Environment

  4. Atmosphere


Correct Option: A

Fuel powered ecosystem is also known as

  1. Urban industrial Ecosystem

  2. Unsubsidized natural solar powered ecosystem

  3. Naturally subsidized solar powered ecosystem

  4. Man subsidized solar power ecosystem


Correct Option: A

What does change over time and space?

  1. Ecological system

  2. Ecosystem

  3. Ecological Function

  4. Environment


Correct Option: B

Zone marking end of troposphere is known as:

  1. Stratopouse

  2. Tropopause

  3. Menopause

  4. Thermopause


Correct Option: B

The way in which carbon is reused through the ecosystem is known as

  1. Energy recycling

  2. The energy pyramid

  3. The biotic/abiotic cycle

  4. The carbon cycle


Correct Option: D
Explanation:

  • The carbon cycle is the series of processes by which carbon compounds are interconverted in the environment, involving the incorporation of carbon dioxide into living tissue by photosynthesis and its return to the atmosphere through respiration, the decay of dead organisms, and the burning of fossil fuels.
  • Carbon is the main component of biological compounds as well as a major component of many minerals such as limestone.
So, the correct answer is 'The carbon cycle'.

The process of photosynthesis and respiration cause the cycling of ........... through the environment.

  1. Carbon

  2. Water

  3. Nitrogen

  4. Hydrogen


Correct Option: A
Explanation:

The plants can fix carbon dioxide from the atmosphere which is taken in through stomata. The carbon dioxide is converted in the presence of light and chlorophyll pigments to synthesize carbon containing organic compounds such as sugar, fats and proteins. This creates the plant biomass which when eaten by other organisms recycles the carbon from on level to other. Finally the carbon enters the geosphere and then the atmosphere. The oxygen which is formed during photosynthesis is liberated in the atmosphere and used for cellular respiration. The oxygen is used to break down the molecules and release the carbon dioxide. The carbon gets recycled in the environment from plants to animals and then again enters the environment. 

Thus, the correct answer is option A.