You notice tiny green plants growing in cracks on your school wall after the monsoon. Where do you think the seeds came from? What conditions helped these plants grow there?
The seeds most likely came from birds that ate fruits containing seeds and excreted them while perched on the wall, or from wind carrying lightweight seeds.
The chapter mentions that when birds or animals eat fruits, seeds often get dropped far from the original plant.
The monsoon provided the essential conditions for growth—water from rain, soil that accumulated in the cracks providing nutrients, sunlight for photosynthesis, and air.
The cracks also offered protection and a place for roots to anchor.
Explanation
The chapter explains seed dispersal through animals and birds, stating 'When birds or animals eat the fruit, the seeds often get dropped far from the original plant.' It also mentions that seeds need water, nutrients, air, and sunlight to germinate and grow, as discussed in the context of seed germination from Grade 6.
Solution Steps
Seeds likely came from birds that excreted them while perched on the wall
Seeds could also have been carried by wind
Birds and animals help disperse seeds far from the original plant
Monsoon provided essential water for growth
Soil in cracks provided nutrients
Sunlight enabled photosynthesis
Air was available for growth
Cracks offered protection and anchoring space for roots