Tag: living in harmony

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Questions Related to living in harmony

Multiple choice biology living in harmony climate factors abiotic components organisms and environment

Read the following statements and choose the correct set of option w.r.t. ecosystem.
I. Various ecosystem are interconnected by flow of energy and transfer of materials.
II. It is self sustained and self regulated segment of nature.
III. Energy flow is always cyclic while flow of nutrients is unidirectional.
IV. Density of ecosystem is governed by degree of biogeochemical cycling and the amount of nutrients.

  1. I, II and IV are correct

  2. I, II and III are correct

  3. Only III is are correct

  4. III and IV are correct
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Statements I and II are correct definitions of ecosystems. Statement IV is correct regarding ecosystem density. Statement III is incorrect because energy flow is unidirectional (from sun to producers to consumers), while nutrient flow is cyclic.

Multiple choice biology living in harmony climate factors abiotic components organisms and environment

Identify which is not correct?

  1. Age of Universe -$20$ Billion years
  2. Age of Earth - $4.5$ Billion years
  3. Life appeared on earth - $500$ million years

  4. Both a & b
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The current scientific estimate for the age of the universe is approximately 13.8 billion years, not 20 billion years. The other values provided are generally accepted scientific approximations.

Multiple choice biology living in harmony climate factors abiotic components organisms and environment

The earth is tilted at an angle of $23.5^{o}$  with respect to the plane of its orbit around the sun. If the amount of tilt were increased to $40^{o}$, we would expect in middle latitudes:

  1. Hotter summers and colder winters than at present

  2. Cooler summers and milder winters than at present

  3. Hotter summers and milder winters than at present

  4. Cooler summers and colder winters than at present
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A greater axial tilt increases the intensity of solar radiation received during the summer (hotter summers) and decreases it during the winter (colder winters) in middle latitudes, as the angle of the sun becomes more extreme.

Multiple choice biology living in harmony climate factors abiotic components organisms and environment

In the stratosphere, the air temperature normally:

  1. Decreases with increasing height

  2. Increases with increasing height

  3. Both increases and decreases depending on the season

  4. Cannot be measured
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In the stratosphere, temperature increases with altitude because the ozone layer absorbs ultraviolet radiation from the sun, which heats the surrounding air.

Multiple choice biology living in harmony climate factors abiotic components organisms and environment

In which ecosystem sun is main source of energy?

  1. Fuel power ecosystem

  2. Man subsidized solar power ecosystem

  3. Unsubsidized natural solar powered ecosystem

  4. Naturally subsidized solar powered ecosystem
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Naturally subsidized solar-powered ecosystems are those that rely on the sun as the primary energy source but are also supported by natural energy flows like tides, wind, or flowing water.

Multiple choice biology living in harmony climate factors abiotic components organisms and environment

The creating force of any ecosystem is

  1. Organic fuels, carbohydrates

  2. Biomass

  3. Solar energy

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

Nearly all of the energy, that drives ecosystems ultimately comes from the sun. 

Solar energy, which is an abiotic factor, enters the ecosystem through the process of photosynthesis. The organisms in an ecosystem, that capture the sun's electromagnetic energy and convert it into chemical energy are called as producers. 
Producers include all of the green plants and some bacteria and algae. The primary consumers exclusively feed on producers. They are known as herbivores. Primary consumers only obtain a fraction of the total solar energy about 10% captured by the producers they eat. 
The other 90% is used by the producer for growth, reproduction, and survival, or it is lost as heat. Primary consumers are eaten by secondary consumers. Secondary consumers are eaten by tertiary consumers.