The diagram below shows a food web in a pond community. From the food web, which population would be the most affected if the frog did not lay eggs?

Adult frogs eat insects, worms, snails, dragonflies, and grasshoppers. Frogs itself are the food for larger frogs and ducks. If the frog does not lay eggs, then the population of frog will decrease, and flies will increase as frog used to feed on flies. The duck population will also get affected because they will not get a sufficient amount of food.

The diagram below shows a food web in a pond community. Which population would benefit the most from the rapid increase of tilapia?

Tilapia are mainly freshwater fish inhabiting shallow streams, ponds, rivers, and lakes, and less commonly found living in brackish water. The population of duck will benefit the most if the population of tilapia will rapidly increase, as duck feed on tilapia. It is a good source of protein, which is essential to build and repair tissues.

E M B I B E

WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 17 - Forest: Our Lifeline>WORKSHEET>Q A

MEDIUM

7th CBSE

IMPORTANT

Earn 100

Draw arrows to make a food web in the following image.

Important Questions on Forest: Our Lifeline

EASY

7th CBSE

IMPORTANT

WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 17 - Forest: Our Lifeline>WORKSHEET>Q B

The diagram below shows a food web in a pond community.

Question Image

It was observed that when the population of Hydrilla's decreased, the population of the tadpoles decreased as well. Apart from the level of oxygen in the pond decreasing because of the decrease in the population of Hydrilla's, suggest another reason as to why the population of tadpoles decreased.