Chapter: 07. Plants And Animals Depend On Each Other
Question 1.
Answers:
a. The producer in the image is the grass, as it makes its own food through photosynthesis.
b. The herbivore shown in the image is the deer, as it eats plants like grass.
c. The vulture plays the role of a scavenger, feeding on the flesh of dead animals in the ecosystem.
Question 2
Answers:
a. The plants in the image are undergoing photosynthesis to produce food, using sunlight, carbon dioxide, and water.
b. The bee and butterfly play the role of pollinators, helping plants reproduce by transferring pollen from one flower to another.
c. Plants benefit animals like bees and butterflies by providing nectar as a food source, which the animals collect for energy.
Question 3.
Answers:
a. The organisms shown breaking down the decaying log are decomposers, such as mushrooms (fungi), earthworms, and bacteria.
b. These organisms play the role of decomposers, breaking down the nutrients in dead plants and animals into simpler substances like manure that return to the soil.
c. Plants benefit from the actions of decomposers as the nutrients released into the soil are used by plants to grow.
Question 4
Answers:
a. In the food chain, the producer is grass, the herbivore is the rabbit, the carnivore is the fox, and the scavenger is the vulture.
b. If the grass dried up due to a drought, the rabbit would have no food and could die, leading to a decrease in the fox population due to lack of prey, and the vulture might also be affected due to fewer dead animals to feed on.
c. The food chain helps maintain the balance of nature by ensuring a stable balance in the numbers of each species, preventing overpopulation or extinction of any one species.
Question 5
Answers:
a. The human-made factor shown in the image is deforestation, which destroys habitats and affects the balance of nature.
b. Deforestation impacts the animals by destroying their shelter, forcing them to flee, and reducing their food sources, which can lead to a decline in their population.
c. A long-term effect on the food chain could be the disruption of the balance, such as a decrease in herbivores due to lack of plants, leading to a decline in carnivores and scavengers, and an overall imbalance in the ecosystem.