Class 10 Science - Chapter How do Organism Reproduce? NCERT Solutions | Why is vegetative propagation practised

Why is variation beneficial to the species but not necessarily for the individual?

Draw a labelled diagram of the longitudinal section of a flower.

What are the functions performed by the testis in human beings?

Why does menstruation occur?

How will an organism be benefited if it reproduces through spores?

Can you think of reasons why more complex organisms cannot give rise to new individuals through regeneration?

Asexual reproduction takes place through budding in

(a) amoeba.
(b) yeast.
(c) plasmodium.
(d) leishmania.

What are the advantages of sexual reproduction over asexual reproduction?

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

How does reproduction help in providing stability to populations of species?

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

What is a good source of energy?

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

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?

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?

What precaution should be taken to avoid the overloading of domestic electric circuits?

Light enters from air to glass having refractive index 1.50. What is the speed of light in the glass? The speed of light in vacuum is 3 × 108 m s–1.

A solution of a substance 'X' is used for whitewashing.

   (i)  Name the substance 'X' and write its formula.
   (ii) Write the reaction of the substance 'X' named in (i) above with water.

At the time of short circuit, the current in the circuit

(a) reduces substantially.
(b) does not change.
(c) increases heavily.
(d) vary continuously.

What are the necessary conditions for autotrophic nutrition and what are its by-products?

How could the Modern Periodic Table remove various anomalies of Mendeléev’s Periodic Table?

What change will you observe if you test soap with litmus paper (red and blue)?

Why does dry HCl gas not change the colour of the dry litmus paper?

What type of oxides are formed when non-metals combine with oxygen?

Why are traits acquired during the life-time of an individual not inherited?