Biology · Environmental Studies

Ecosystem Nutrition and Energy Flow

1,235 Questions

Ecosystem nutrition and energy flow questions cover trophic levels, food chains, and biodegradable materials. These concepts frequently appear in general science sections of major competitive exams. Review these questions to build a solid understanding of ecological interactions.

Trophic levels conceptFood chain orderAutotrophic nutritionEnergy assimilationScavengers and decomposers

Ecosystem Nutrition and Energy Flow Questions

Multiple choice biology adaptation terrestrial adaptations in plants adaptation in terrestrial plants terrestrial adaptation desert ecosystem terrestrial adaptation in animals

The prickly pear cactus became unusually abundant after its introduction in Australia, because it _________________.

  1. had no co evolved herbivores

  2. formed new mycorrhizall association

  3. lost its thorns

  4. all of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Co evolution is caused by the selection pressure that each of the two species exerts on the other since there has been no co-evolved herbivore with prickly cactus, it became abundant in Australia.

Multiple choice biology micro - organism useful actions of algae introduction to algae algae

.......... is a source of additional fuel through carbohydrates.

  1. Algae

  2. Bacteria

  3. Protozoa

  4. Fungi
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Algae are photosynthetic organisms related to plants that grow in water and produce energy from carbon dioxide and sunlight. Single-celled microalgae can be used to produce large amounts of fat, which can be converted into biodiesel, the most common form of biofuel. The carbohydrate content of algae can be fermented into bioethanol or butanol fuel.
So,  the correct option is 'algae'. 
Multiple choice biology micro - organism useful actions of algae introduction to algae algae

Alga that is useful for prolonged space flight for liberation of oxygen, consumption of $C{O} _{2}$, disposal of wastes and formation of food is

  1. Ulva

  2. Caulerpa

  3. Chlorella

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

Chlorella is widely known in biological studies for its efficiency in photosynthesis, making it a candidate for oxygen regeneration and food production in closed environments like space crafts.

Multiple choice biology human influences on the environment human intervention in ecosystems humans in the environment involvement of humans in the conservation of environment

Which ecosystem is very important for man to produce food and fiber?

  1. Man subsidized solar power ecosystem

  2. Unsubsidized natural solar powered ecosystem

  3. Naturally subsidized solar powered ecosystem

  4. Fuel power ecosystem
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Man-subsidized solar-powered ecosystems, such as modern farms, use additional energy inputs to maximize the production of food and fiber compared to natural, unmanaged ecosystems.

Multiple choice evs food of animals animal and their eating habit classification of animals on the basis of food types of animals

The lion is a carnivore because

  1. The lion feeds on grass.

  2. The lion feeds on the flesh of other animals.

  3. The lion feeds on insects.

  4. All of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Lions are “Obligate Carnivores”, which means they rely only on the flesh of other animals for their nutritional needs. The animals that consume meat, as well as non-animal foods, are known as “Facultative Carnivores”.
Hence B is the correct option. 

Multiple choice evs food of animals animal and their eating habit classification of animals on the basis of food types of animals

Cow feeds on grass and grains and is grouped under

  1. Carnivore

  2. Herbivore

  3. Omnivore

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Herbivores are the kind of animals whose diet comprises of solely plants. There are different types of herbivores. They further divide into the category of insect herbivores and mammalian herbivores. Mammalian herbivores are found in abundance. They include cows, deer, horses, sheep and more. Hence, correct option is B.