Class 10 Science - Chapter Life Processes NCERT Solutions | How are the alveoli designed to maximise

Why is diffusion insufficient to meet the oxygen requirements of multi-cellular organisms like humans?

How is the amount of urine produced regulated?

What are the different ways in which glucose is oxidised to provide energy in various organisms?

What criteria do we use to decide whether something is alive?

The breakdown of pyruvate to give carbon dioxide, water and energy takes place in

        (a) cytoplasm.               (c) chloroplast.
        (b) mitochondria.           (d) nucleus.

What are the differences between autotrophic nutrition and heterotrophic nutrition?

What are the components of the transport system in highly organised plants?

What are outside raw materials used for by an organism?

What would be the consequences of a deficiency of haemoglobin in our bodies?

What advantage over an aquatic organism does a terrestrial organism have with regard to obtaining oxygen for respiration?

Did Döbereiner’s triads also exist in the columns of Newlands’ Octaves? Compare and find out.

What is a good source of energy?

What are trophic levels? Give an example of a food chain and state the different trophic levels in it.

What changes can you make in your habits to become more environment-friendly?

What is the difference between a reflex action and walking?

What is the importance of DNA copying in reproduction?

If a trait A exists in 10% of a population of an asexually reproducing species and a trait B exists in 60% of the same population, which trait is likely to have arisen earlier?

Why should a magnesium ribbon be cleared before burning in air?

Define the principal focus of a concave mirror.

You have been provided with three test tubes. One of them contains distilled water and the other two contain an acidic solution and a basic solution, respectively. If you are given only red litmus paper, how will you identify the contents of each test tube?

Besides gallium, which other elements have since been discovered that were left by Mendeléev in his Periodic Table? (any two)

What is the role of the brain in reflex action?

What were the criteria used by Mendeléev in creating his Periodic Table?

Can you suggest some changes in your school which would make it environment-friendly?

Why are decomposition reactions called the opposite of combination reactions? Write equations for these reactions.

A shiny brown coloured element ‘X’ on heating in air becomes black in colour. Name the element ‘X’ and the black coloured compound formed.

How would these advantages differ from the advantages of using a long-term perspective in managing our resources?

What are the qualities of an ideal source of energy?

Design an experiment to demonstrate hydrotropism.

What kind of mirror – concave, convex or plain – would be best suited for use in a solar cooker? Why?