Question

1.what is transpiration?
2.what is the role of guard cells?
3.two differences b/w autotrophic and hetrotrophic nutrition

Answer 1

1. loss of excess water in plants through leaves
2.when they open then only transpiration takes place
3.autotrphic -makes its own food
hetrotrophic - dependent on other organism for food

Answer 2

transpiration  process by which evaporation takes place
guard cells  exchange of gases takes place
autotrophs
+prepare their own food
heterotrophs
+depends on autotrophs for food