Only dav students solve these questions of class 7
Answers
Answer:
1- nutrition is very important in a healthy lire style. combined with physical activity our diet plays a very important role in maintaining healthy weight and reduce the risk of chronic diseases
2- greenbplants are also caleed autotrophs cause they synthesis their own food with the help of chloroplast,water, CO2,light.
3-vessel play an imp role in water transport in plants which they occur. They form a efficient system of transporting water from root to shoot
4-
a- symbiotic relationship is b/w algae and fungi. algae provides food,whereas fungi provides shelter.algae called phycobiont,fungi is called mycobiont.
b- nutrients is the substance that provides nourishment to the body to maintain healthy life
c- saprophytic mode of nutrition is seen in mushroom. they depends on dead and decaying organisms for their food
d- photosynthesis is the process in which plants prepare their food by splitting of light
5- when we left the wheat dough in open air after some time formation of fungus and reproduction of yeast takes place and the dough becomes unfit to eat and so foul smell comes from fough