Question

Which of the following is the primary producer in a pond ecosystem?
A. Algae
B. Fungi
C. Virus
D. Bacteria

Answer 1

It is an interaction between living and non- living components.

It consists of two main components: Biotic and abiotic components.
Ecosystems provide habitat to various plants and animals.
Ecosystem helps in recycling of nutrients from biotic and abiotic components.

Complete answer:
In order to answer this question, we need to know what an ecosystem is.
Ecosystem: It is defined as a group or system in which living and non living components of the environment interact with each other through nutrient cycle or by the food chain.

Basically, an ecosystem composed of two main components.
A) Biotic components
B) Abiotic components
Biotic components: Biotic components or biotic factors are the living components of the ecosystem.
Biotic factors are grouped into three major categories:
1. Producers: Also known as autotrophs, Convert light energy into food.
For example: Green plants etc.
2. Consumers: Also known as heterotrophs, depends upon the producers for food For example: herbivores or carnivores.
3. Decomposers: Also known as detritivores break chemicals from producers and consumers. For example: omnivores
Abiotic components: Abiotic components or abiotic factors are the non living component of the ecosystem.
Abiotic factors are atmosphere, chemical, sunlight/temperature, wind, and water.
Pond’s ecosystem: It refers to the freshwater ecosystem where there are communities of organisms dependent on each other with the water environment for their nutrients and survival.
The chlorophyll in plants helps in carrying out the process of photosynthesis.
Phytoplankton is microscopic algae that float in the open water and give it a green appearance.
They carry photosynthesis that releases oxygen that is used by the bacteria and animals in the pond.
Periphytic algae are microscopic algae that attach themselves to substrates and give the rocks a greenish brown appearance.
They also carry out photosynthesis and release oxygen mainly near the bottom of the pond where it is further used up by the decomposers.

So, the correct answer is option A. Algae.

Note: Biodiversity is a biological diversity which means different kinds of life forms are present on the earth.
Major components of biodiversity are ecosystems diversity, species diversity, and genetic diversity.