Class 10 Science - Chapter Life Processes NCERT Solutions | The breakdown of pyruvate to give carbon

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?

What are the differences between autotrophic nutrition and heterotrophic nutrition?

What are outside raw materials used for by an organism?

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

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?

Where do plants get each of the raw materials required for photosynthesis?

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?

The device used for producing electric current is called a

(a) generator.
(b) galvanometer.
(c) ammeter.
(d) motor.

How is the equal genetic contribution of male and female parents ensured in the progeny?

What were the limitations of Döbereiner’s classification?

By considering their position in the Periodic Table, which one of the following elements would you expect to have maximum metallic characteristic?
Ga     Ge      As     Se     Be

Find the focal length of a lens of power – 2.0 D. What type of lens is this?

Explain the underlying principle and working of an electric generator by drawing a labelled diagram. What is the function of brushes?

How does the embryo get nourishment inside the mother’s body?

When a 12 V battery is connected across an unknown resistor, there is a current of 2.5 mA in the circuit. Find the value of the resistance of the resistor.

What is the role of decomposers in the ecosystem?

Name two elements you would expect to show chemical reactions similar to magnesium. What is the basis for your choice?