Name: Scarity of Water
Uploaded: 2019-07-19
Duration: 6 min 34 s
Description: In this video, we will learn about a shortage of water and its preventions, the effect of scarcity of water on plants and plant bodies if they are not irriga...

Question

The diagram below shows a food web.

a) Use the food web to draw a food chain that has four trophic levels.

b) All the frogs in the food web die of a disease. Explain what will happen to the size of the population of snails.

Accepted Answer

a) The food web can be best defined as the graphical representation of different food chains occurring in the environment. A food chain can be best defined as a sequence of organisms in which nutrients and energy is transferred from one organism to the other. The food chain consisting of four trophic level from the given food web will be Algae $\overset{}{\to}$ Snail $\overset{}{\to}$ Frog $\overset{}{\to}$ Kingfisher.

(primary producer) $\to$ (primary consumer) $\to$ (secondary consumer) $\to$ (tertiary consumer)

In this food chain algae is the primary producer. They are autotrophic and prepare their food through photosynthesis. Snail is the primary consumer. Frog is the secondary consumer. Kingfisher is the tertiary consumer.

b) If all the frogs die due to a disease, then the snail's population will increase. There will be no threat to the snail's population as the frog will die. The balance of the food web will be disturbed. The growth of algae will decline as more snails will feed on them.

Resource	Plants	Animals	Both plants and animals
Sunlight	X
Water
A source of food
Carbon dioxide

The diagram below shows a food web.

a) Use the food web to draw a food chain that has four trophic levels.

b) All the frogs in the food web die of a disease. Explain what will happen to the size of the population of snails.

Important Questions on Ecology

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