Q3.Which is an important constituent of protein involved in transfer of electrons?
Answer : Option DExplaination / Solution: Plants obtain iron in the form of ferric ions (Fe3+). It is required in larger amounts in comparison to other micronutrients. It is an important constituent of proteins involved in the transfer of electrons like ferredoxin.
Answer : Option DExplaination / Solution:
Kelps are marine algae of class phaeophyceae or brown algae. The body of kelp may reach upto 100 meter long. They vary in colour from olive green to various shades of brown depending upon xanthophyll pigments , fucoxanthin present in them.
Q9.The essential role of air in the growth of green plants is given by
Answer : Option AExplaination / Solution:
Joseph Priestley (1733-1804) in 1770 performed a series of experiments that revealed the essential role of air in the growth of green plants.