Tag: organisms and environment

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Questions Related to organisms and environment

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. 

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

Ecosystem has two components. They are

  1. Plants and animals

  2. Trees and fungi

  3. Living and nonliving

  4. Frogs and man
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

An ecosystem is made up of components, biotic and abiotic. Biotic components constitute all the living members of an ecosystem. While abiotic component of an ecosystem consists of non-living substances and factors such as air, water soil, sunlight etc. Thus option C is the correct answer. 

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

Soil erosion can occur due to

  1. Rains or floods

  2. High velocity winds

  3. Deforestation

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

Soil is made up of many layers, forming soil profile. The uppermost layer of soil is made up of sandy soil that withers away quickly under the effect of blowing wind, flowing water in the form of rains or floods. Apart from this, trees hold the soil particles together with the help of their roots. Deforestation activities lead to a decrease in the number of trees resulting in an increase in the rate of soil erosion.

So, option D "All of the Above" is the correct answer.

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

Which of the following occurs in abiotic component of ecosystem?

  1. Flow of energy

  2. Cycling of materials

  3. Consumers

  4. Flow of energy and cycling of materials
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Flow of energy and consumers are part of biotic components of ecosystem. Water, carbon, nitrogen and phosphorous all take paths from the non-living environment to living organisms, such as trees and then back to non-living environment. These paths known as biogeochemical cycles. In these cycles, a pathway is formed when a substance enters into living organisms, stays for a long time, then returns to the non-living environment. As it is part of abiotic component of ecosystem.

Therefore, the correct answer is option B.

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

Primary source of energy in an ecosystem is

  1. Sugar stored in plants

  2. Heat liberated during respiration

  3. Solar energy

  4. Heat liberated during fermentation
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The fundamental source of energy in almost all ecosystems is radiant energy from the sun. The energy of sunlight is used by the ecosystem's autotrophic, or self-sustaining, organisms. Consisting largely of green vegetation, these organisms are capable of photosynthesis - i.e., they can use the energy of sunlight to convert carbon dioxide and water into simple, energy-rich carbohydrates. The autotrophs use the energy stored within the simple carbohydrates to produce the more complex organic compounds, such as proteins, lipids, and starches, that maintain the organism's life processes. Organic matter generated by autotrophs directly or indirectly sustains heterotrophic organisms. Heterotrophs are the consumers of the ecosystem; they cannot make their own food. 

Therefore, the correct answer is option C.

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

Which one of following word is related to Homo sapiens? 

  1. Herbivore

  2. Carnivore

  3. Omnivore

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

Human beings (Homo sapiens) are omnivores. People eat plants, such as vegetables and fruits. We eat animals, cooked as meat or used for products like milk or eggs. We eat fungi such as mushrooms. We also eat algae in the form of edible seaweeds such as nori, which are used to wrap sushi rolls, and sea lettuce is eaten in salads. Bears are omnivores, too. They eat plants like berries as well as mushroom (fungi) and animals like salmon or deer.

Therefore, the correct answer is option C.

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

Soil is affected by

  1. Wind

  2. Rainfall, temperature

  3. Light and humidity

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

The flow of wind and its rate affects the rate of soil erosion. Rainfall governs the amount of groundwater available to the soil. Temperature also affects the constitution of soil. The amount of sunlight and humidity in the air also affect the type of soil and characteristics of soil particles. 

So, option D is the correct answer.

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

The main factor for determining the distribution and abundance of eukaryotic extremophiles is

  1. Temperature

  2. Water availability

  3. Location

  4. Abundance of food
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Eukaryotic extremophiles inhabit areas where there exists a source of food or energy. They however are not found in high temperature (>/= 70$^0$C) and deep subsurface areas or areas of high pressure
So, the correct answer is 'Abundance of food'
Multiple choice biology living in harmony climate factors abiotic components organisms and environment

Which of the following is most important abiotic factor in pond ecosystem?

  1. Water

  2. Phythoplankton

  3. Zooplankton

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

Abiotic factor means the non living chemical or physical parts of the ecosystem. So, considering that only water and temperature are the abiotic components out of all the given options. Since, pond is the ecosytem here, water is the most important abiotic factor, because pond is essentially made of up water. If water isnt present no pond ecosytem will exist.

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

Maximum contribution of $O _2$ is from

  1. Phytoplankton

  2. Grasslands

  3. Herbs and shrubs

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

In nature, major source of liberation of oxygen is photosynthesis. Photodissociation liberates oxygen from water during the process of photosynthesis. Phytoplanktons are the most abundant photosynthesizers in nature.