Answer the following:
Sujata was observing the V.S. of maize leaf under the compound microscope. She observed epidermis, mesophyll and vascular bundles and described them in detail. What she must have described?

Answer the following: Pooja observed a plant of pea and maize. She differentiated them based on the following characters: Types of roots, venation in the leaves and number of cotyledons in seed.Make a table and write the characters of these plants based on the given points:

Answer the following : During a field visit an Andaman, Rahul observed that some volunteers were not allowing tourist to collect shells from the beaches. When he asked his teacher, she replied that it is an attempt to protect the ecosystem and explained the importance of seashells. What might have been her explanation?

Vinaya while playing in garden observed a pond with a green coloured covering which was floating on the surface of water? Next day she asked her teacher about the same. What her teacher must have told her?

Veena observes that during winter setting of milk into curd takes more time while during summer, the same process happens faster. She asks about this difference in time taken to her elder sister. She also asks her sister about why certain reactions occur rapidly while others occur slowly. Her sister explains her about the various factors that affect the rate of chemical reactions. Based on the above scenario, answer the following questions. The reaction of aluminum metal with dilute hydrochloric acid takes place faster as compared to zinc metal. What could be the reason for this difference?