Carbon and its Compounds — Science STD 10 — Question

What happens when ethanoic acid reacts with sodium hydroxide? Write equation of the reaction involved.

What is meant by the term ‘fission’ as used in biology?

Name two devices used in the barrier method of birth control.

Which type of nucleus is found in bacteria cell?

If 5 joules of energy is available at producer level (plants), then how much energy will be transferred to the lion in the following food chain? If 5 joules of energy is available at producer level (plants), then how much energy will be transferred to the lion in the following food chain? Plants → Goat → Lion

Why do the walls of trachea not collapse when there is less air in it?

Where are a plant’s sex organs located?

Name the areas in a woody stem through which respiratory exchange of gases takes place.

State one characteristic which shows that the birds are very closely related to dinosaurs.

Name one unicellular organism which reproduces by the same asexual process as Hydra.