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 botany taxonomy and systematic botany plant taxonomy taxonomy and systematics classification of biodiversity

The accumulation of non-biodegradable substances in a food chain in increasing amount at each higher trophic level is known as _____________.

  1. Accumulation

  2. Eutrophication

  3. Pollution

  4. Bio magnification
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The increase in concentration of non-biodegradable substance with subsequent trophic level of a food chain is called bio-magnification.

Multiple choice biology adaptations to different ecosystems lichen lichens lichens ( the nature's pioneers )

A carnivore with stripes on its body moves very fast while catching its prey. It is likely to be found in

  1. Polar regions

  2. Deserts

  3. Oceans

  4. Tropical rainforests
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Here, the given characteristics depict the features of the tiger. It is one of the topmost predators in the tropical rainforests because its unique adaptation is suitable to live in that environment. One among them is their dark fur coat, blue eyes and black stripes. Here, the black stripes are more than 100 in number and used for identification of tiger. It attacks other animals by surprise so it also knows as ambush predator and tigers are the very fastest animal.

So, the correct answer is option D.

Multiple choice botany adaptations to different ecosystems lichen lichens lichens ( the nature's pioneers )

Which of the following statement is wrong about lichens?

  1. Some species are eaten by Reindeers.

  2. Lichens are indicators of pollution.

  3. They grow rapidly about 2 cm per day.

  4. They have symbiotic relationship between alga and fungus.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Lichens are known for their extremely slow growth rates, often growing only a few millimeters per year, not 2 cm per day.

Multiple choice botany adaptations to different ecosystems lichen lichens lichens ( the nature's pioneers )

Which statements is wrong about lichens?

  1. Some species are eaten by reindeers

  2. Lichens are indicators of pollutions

  3. They grow rapidly about 2 cm per day

  4. They have algal and fungal partners in their thallus
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Lichen is a symbiotic partnership between fungus and alga. It has algal and fungal partners in its thallus. In this, the fungus is a dominant partner. Hence, lichen has majority of characteristics of fungus. It absorbs sulphur dioxide from the atmosphere. Hence, it is widely used as indicator of air pollution. It grows very slowly.  It is eaten by snails, squirrels and some species of monkeys and reindeers during winter. They grow at 1 mm per day.

Thus, the correct answer is 'They grow rapidly about 2 cm per day.'

Multiple choice botany living world lichen lichens lichens ( the nature's pioneers )

Which of the following are functions of phycobiont in a lichen?

  1. Synthesis of organic food

  2. Nitrogen fixation

  3. Mineral absorbtion

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

a) The phycobiont part of lichen is the autotrophic part which constitutes algae. The function of autotrophic algae is to provide nutrition. It synthesizes organic food by the process of photosynthesis.
b) If the algal component is blue-green algae, then apart from photosynthesis phycobionts also carry out nitrogen fixation. Nostoc, blue-green algae consist of heterocysts that have the enzyme nitrogenase. Nitrogenase converts atmospheric nitrogen into a usable form of nitrogen.

c) Mineral absorption is done by fungal mycelium.
So the correct answer is ' Synthesis of organic food and NItrogen fixation'.

Multiple choice examples of bryophytes plant kingdom biology

The stem and leaves of Funaria are

  1. Analogous to those of angiosperms

  2. Homologous to those of angiosperms

  3. Not comparable to those of angiosperms in any way

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

The stem and leaves of Funaria are analogous to those of angiosperms because they perform similar functions (support and photosynthesis) but have different evolutionary origins and structures.

Multiple choice examples of bryophytes plant kingdom biology

The sporophyte of Funaria is termed

  1. Sporangium

  2. Sporogonium

  3. Sporozoite

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

The sporophyte of mosses, which consists of foot, seta, and capsule, is technically referred to as a sporogonium. Sporangium is a general term for a spore-producing structure.

Multiple choice biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

Angiosperms have dominated the land flora primarily because of their

  1. Domestication by man

  2. Power of adaptability in diverse habitat

  3. Property of producing large number of seeds

  4. Nature of self pollination
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Angiosperms are most diverse and widespread of all plant groups. Their dominance is due to the power of adaptability in diverse habitat. They are well adapted to terrestrial life and occur in diverse habitats like cold tundra to hot tropical and even desert areas. They also thrive well in the aquatic habitat. Therefore, they being the most successful to have dominated the land flora. Hence option B is correct.

Multiple choice

Who are the producers in this cycle?

  1. Humans

  2. Animals

  3. Machines

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

In the carbon cycle, plants are the producers because they create their own food through photosynthesis, converting sunlight, water, and carbon dioxide into energy. Animals, humans, and machines are consumers - they cannot produce their own food. This question appears to be about ecological food chains and carbon cycling.

Multiple choice

What eats dead animals and plants?

  1. Animals

  2. Plants

  3. Humans

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

Decomposers, such as bacteria and fungi, break down dead organic matter, recycling nutrients back into the ecosystem.

Multiple choice

What happens to the majority of the carbon animals consume?

  1. Nothing

  2. Released as carbon dioxide

  3. It goes back the plants

  4. Kills the animal
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Most of the carbon consumed by animals is used for energy through cellular respiration, which releases the carbon back into the atmosphere as carbon dioxide.