How are the modes for reproduction different in unicellular and multicellular organisms?
In unicellular organisms, asexual reproduction occurs where there is only one parent is involved and no gamete production or parthenogenesis occurs, where one parent cell gets divided into two or multiple daughter cells by binary or multiple fission (eg. Binary fission shown in bacteria, amoeba, planarians and multiple fission shown in plasmodium).
In multicellular organisms, sexual reproduction occurs where two parents are involved to form a zygote or parthenogenesis occurs. All mammals human beings, apes etc. show sexual reproduction process where mother shows viviparity, i.e, gives birth directly to the young ones.
Popular Questions of Class 10 Science
- Q:-
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.
- Q:-
Outline a project which aims to find the dominant coat colour in dogs.
- Q:-
Draw the structure for the following compounds.
(i) Ethanoic acid (ii) Bromopentane*
(iii) Butanone (iv) Hexanal.*Are structural isomers possible for bromopentane?
- Q:-
A hot plate of an electric oven connected to a 220 V line has two resistance coils A and B, each of 24 Ω resistance, which may be used separately, in series, or in parallel. What are the currents in the three cases?
- Q:-
How is the sex of the child determined in human beings?
- Q:-
(a) What property do all elements in the same column of the Periodic Table as boron have in common?
(b) What property do all elements in the same column of the Periodic Table as fluorine have in common? - Q:-
Calculate the number of electrons constituting one coulomb of charge.
- Q:-
What is an homologous series? Explain with an example.
- Q:-
Why is variation beneficial to the species but not necessarily for the individual?
- Q:-
A man with blood group A marries a woman with blood group O and their daughter has blood group O. Is this information enough to tell you which of the traits – blood group A or O – is dominant? Why or why not?
Recently Viewed Questions of Class 10 Science
- Q:-
Outline a project which aims to find the dominant coat colour in dogs.
- Q:-
Why does dry HCl gas not change the colour of the dry litmus paper?
- Q:-
Name some sources of direct current.
- Q:-
Why does menstruation occur?
- Q:-
A ray of light travelling in air enters obliquely into water. Does the light ray bend towards the normal or away from the normal? Why?
- Q:-
Write the balanced equation for the following chemical reactions.
1. Hydrogen + Chlorine → Hydrogen chloride
2. Barium chloride + Aluminium sulphate → Barium sulphate + Aluminium chloride
3. Sodium + Water → Sodium hydroxide + Hydrogen - Q:-
10 mL of a solution of NaOH is found to be completely neutralised by 8 mL of a given solution of HCl. If we take 20 mL of the same solution of NaOH, the amount HCl solution (the same solution as before) required to neutralise it will be
(a) 4 mL (b) 8 mL (c) 12 mL (d) 16 mL
- Q:-
Name two metals which are found in nature in the free state.
- Q:-
How would you distinguish experimentally between an alcohol and a carboxylic acid?
- Q:-
Why is the amount of gas collected in one of the test tubes in Activity 1.7 double of the amount collected in the other? Name this gas.
- NCERT Chapter