________ are producers
Amoeba
Mushrooms
Sunlight
Green plants
(4)
Green plants are producers. They produce their own food, which provides them with the energy they require to grow, reproduce, and survive. They are the only living beings on earth capable of producing their own supply of food energy, which makes them unique.
The % of solar radiation absorbed by all the green plants for the process of photosynthesis is about:
1%
5%
8%
10%
(1)
For the process of photosynthesis, green plants capture roughly 1% of the energy of sunlight that falls on their leaves. This energy is converted into chemical energy, which is then used to make food.
All the organisms are not capable of utilising the sun’s energy directly for meeting their energy requirements. This gap is filled by:
(i) all green plants
(ii) some species of bacteria
(iii) algae
(iv) all bacterial species and plant species
(ii) and (iv)
(ii) and (iii)
(i), (ii) and (iii)
Only (i)
(3)
All green plants, some species of bacteria and green algae are capable of converting sunlight into a useful form by the process of photosynthesis.
Which of the following would be affected by the decrease in the producer population?
All the organisms in the ecosystem.
The organisms in the next trophic level.
The organisms at the highest trophic level.
None of the organisms in the food chain will be affected.
(1)
A decrease in the population of producers would directly and indirectly affect all the organisms in that ecosystem.
Which of the following statements is correct?
All plants and bacteria are producers.
All green plants and certain bacteria are producers.
Only some species of green plants and all bacteria are producers.
Only green plants are producers.
(2)
All green plants and certain bacteria are producers in an ecosystem.
In ________ presence of ________, along with sunlight is required to make organic compounds.
producers; chlorophyll
decomposers; chlorophyll
producers; carbon
consumers; carbon
(1)
In producers, the presence of chlorophyll, along with sunlight is required to produce glucose.
The decomposers in an ecosystem:
convert inorganic material to simpler forms.
convert organic material to inorganic forms.
convert inorganic materials into organic compounds.
do not break down organic compounds.
(2)
Decomposers in an ecosystem transform organic material into inorganic forms, which are then reused by plants in the soil. Decomposers eat dead bodies, waste products, and organisms.
What will happen if deer is missing in the food chain given below?
The population of tiger increases.
Tiger will start eating grass.
The population of grass decreases.
The population of tiger decreases and the population of grass increases.
(4)
The tiger is a secondary consumer which eats deer. If the deer is missing, there will be no food for the tiger. So, if deers are missing, the population of grass will increase.
Food chain does not comprise of which of the following groups of organisms?
(i) Grass, lion, rabbit, wolf
(ii) Plankton, man, fish, grasshopper
(iii) Wolf, grass, snake, tiger
(iv) Frog, snake, eagle, grass, grasshopper
(i), (iii)
(iii), (iv)
(ii), (iii)
(i), (iv)
(3)
The flow of energy from one organism to another taking part at various biotic levels forms a food chain. A food chain describes the feeding relationships between the organisms within that ecosystem. Food chain (ii) is an aquatic food chain so grasshopper cannot be a part of it. In food chain (iii), wolf, snake and tiger all are carnivores. There is no herbivore to eat grass or herbivore is missing from the chain.
Why do all food chains start with plants?
Because plants are easily grown.
Because plants are nutritious.
Because plants can produce its own energy.
Because plants do not require energy.
(3)
A food chain starts with a plant. This is because every food chain needs the presence of organisms that can manufacture their own food. Green plants are called as producers as they can synthesise their own food in the presence of sunlight and therefore, most of the food chains start with plants.
