What are the methods used by plants to
[question] Question. What are the methods used by plants to get rid of excretory products ? [/question] [solution] solution: The method used by plants to get rid of excretory products are (i) The oxygen which is produced during the process of photo-synthesis gets removed through stomata. (ii) The carbon dioxide which is produced during the process of respiration also gets removed through stomata. (iii) The excess of water gets removed through transpiration. (iv) Some other wastes get removed alo...
Read More →What are the functions of areolar tissue?
[question] Question. What are the functions of areolar tissue? [/question] [solution] Solution: Areolar tissue fills the space inside the organs, supports internal organs and helps in repair of tissues. [/solution]...
Read More →The industrial revolution in England and Western Europe more than two centuries ago was triggered by some key scientific and technological advances.
[question] Question The industrial revolution in England and Western Europe more than two centuries ago was triggered by some key scientific and technological advances. What were these advances? [/question] [solution] Solution Some of the main developments in science and technology during this era include: (1) The use of heat and thermodynamics to form the steam engine. (2) Electricity discovery and implementation helped to create motors and dynamos. (3) Study of gravitation led to the study of ...
Read More →Given the linear equation 2x + 3y – 8 = 0
[question] Question. Given the linear equation $2 x+3 y-8=0$, write another linear equation in two variables such that the geometrical representation of the pair so formed is : (i) Intersecting lines (ii) Parallel lines (iii) Coincident lines [/question] [solution] Solution: (i) 2x + 3y – 8 = 0 (Given equation) 3x + 2y + 4 = 0 (New equation) Here, $\frac{\mathbf{a}_{1}}{\mathbf{a}_{2}} \neq \frac{\mathbf{b}_{1}}{\mathbf{b}_{2}}$ Hence, the graph of the two equations will be two intersecting line...
Read More →Describe the structure and functions of nephron.
[question] Question. Describe the structure and functions of nephron. [/question] [solution] solution: The nephron is the functional unit of the kidney. A nephron consists of a twisted tubule closed at one end, open at the other with a network of associated blood vessels. Each kidney of man is formed of about one million nephrons. Each nephron has a length of about 3 cm. It is differentiated into 4 regions having different anatomical features and different physiological roles. Nephron : The 4 re...
Read More →Give three features of cardiac muscles
[question] Question. Give three features of cardiac muscles. [/question] [solution] Solution: 1. These are involuntary muscles. 2. These are cylindrical, branched and uninucleate. 3. The muscles show rhythmic contraction and reaxation throughout life. [/solution]...
Read More →Why did the Tsarist autocracy collapse in 1917?
[question] Question. Why did the Tsarist autocracy collapse in 1917? [/question] [solution] Solution: The Tsarist autocracy collapsed in 1917 because of public mistrust and a growing dissatisfaction with the Tsar’s policies. The Tsar, Nicholas II imposed restrictions on political activity, changed voting laws and dismissed any questioning of or restrictions on his authority. At the beginning of the First World War, he did not consult the main parties in the Duma. Anti-German sentiments were gain...
Read More →What does a neuron look like?
[question] Question. What does a neuron look like? [question] [solution] Solution: A neuron consists of a cell body with a nucleus and cytoplasm, from which long thin hair like parts arise. Usually each neuron has a single long part, called the axon, and many short, branched parts (processes) called dendrites. An individual nerve cell may be up to a metre long. [/solution]...
Read More →In what ways was the working population in Russia different from other countries in Europe,
[question] Question. In what ways was the working population in Russia different from other countries in Europe, before 1917? [/question] [solution] Solution: The working population in Russia was different from other countries in Europe before 1917 because not all Russian workers migrated from the villages to work in the industrial sector. Some of them continued to live in villages and went to work daily, to the towns. They were a divided group, socially and professionally, and this showed in th...
Read More →How is food transported in plants.
[question] Question. How is food transported in plants. [/question] [solution] solution: Food is transported in dissolved form through phloem. This process is called as translocation. [/solution]...
Read More →What were the social,
[question] Question. What were the social, economic and political conditions in Russia before 1905? [/question] [solution] Solution: The social, economic and political conditions in Russia before 1905 were variously beneficial and bad for the masses. 85% of Russia’s population was agriculturist, far more than France or Germany with 40-50%. Industry was existent, but sporadically. Most of this was privately owned. Workers either came from villages, or migrated to cities for employment in factorie...
Read More →Name the tissue responsible for movement in our body
[question] Question. Name the tissue responsible for movement in our body [/question] [solution] Solution: Muscular tissue is responsible for movement in our body [/solution]...
Read More →How are water and minerals
[question] Question. How are water and minerals transported in plants ? [/question] [solution] solution: In xylem tissue, vessels and tracheids of the roots, stems and leaves are interconnected to form a continuous system of water-conducting channels reaching all parts of the plant. At the roots, cells in contact with the soil actively take up ions. This creates a difference in the concentration of these ions between the root and the soil. Water, therefore, moves into the root from the soil to e...
Read More →How would you explain the rise of Napoleon?
[question] Question. How would you explain the rise of Napoleon? [/question] [solution] Solution: The rise of Napoleon came right after the fall of the Directory in 1796. The Directors often clashed with the legislative councils, who then made attempts to dismiss them. The Directory was highly politically unstable; hence, Napoleon rose to power as a military dictator. Earlier, the Jacobins had overthrown King Louis XVI and established governance on their own module; but Robespierre’s administrat...
Read More →What are the constituents of phloem ?
[question] Question. What are the constituents of phloem ? [/question] [solution] Solution: Sieve tubes, companion cells, phloem parenchyma and phloem fibres. [/solution]...
Read More →Would you agree with the view that the message of universal rights was beset with contradictions?
[question] Question. Would you agree with the view that the message of universal rights was beset with contradictions? Explain [/question] [solution] Solution: The message of universal rights was beset with contradictions. Many ideals in the “Declaration of Rights of Man and Citizen” were replete with dubious meanings. For example, “the law has the right to forbid only actions injurious to society” had nothing to say about criminal offences against other individuals. Also, the declaration stated...
Read More →What are the components of the transport
[question] Question. What are the components of the transport system in highly organised plants ? [/question] [solution] solution: Transport system of highly organised plants consists of xylem and phloem. (i) Xylem. It is used in transport of water and minerals. Xylem is made of tracheids, vessels, xylem fibers and xylem parenchyma. Tracheids and vessels constitute the tracheary elements or channels for transport of water and minerals. (ii) Phloem. It is used for transport or translocation of or...
Read More →Which of the following pairs of linear equations are consistent/inconsistent?
[question] Question. Which of the following pairs of linear equations are consistent/inconsistent? If consistent, obtain the solution graphically : (i) $x+y=5.2 x+2 y=10$ (ii) $x-y=8,3 x-3 y=16$ (iii) $2 x+y-6=0,4 x-2 y-4=0$ (iv) $2 x-2 y-2=0,4 x-4 y-5=0$ [/question] [solution] Solution: (i) $x+y=5$ ...(i) $2 x+2 y=10 \quad \ldots$ ...(ii) $\frac{a_{1}}{a_{2}}=\frac{1}{2}, \frac{b_{1}}{b_{2}}=\frac{1}{2}, \frac{c_{1}}{c_{2}}=\frac{-5}{-10}=\frac{1}{2}$ i.c., $\frac{a_{1}}{a_{2}}=\frac{b_{1}}{b_{...
Read More →Which tissue makes up the husk of coconut ?
[question] Question. Which tissue makes up the husk of coconut ? [/question] [solution] Solution: Sclerenchyma...
Read More →Draw up a list of democratic rights we enjoy today
[question] Question. Draw up a list of democratic rights we enjoy today whose origins could be traced to the French Revolution. [/question] [solution] Solution: Democratic rights that we enjoy today whose origins can be traced to the French Revolution are: freedom of expression, right to equality, right to freedom, right to assemble and form unions (as long as they are not a threat to national security and peace). [/solution]...
Read More →Where is apical meristem found ?
[question] Question. Where is apical meristem found ? [/question] [solution] Solution: Apical meristem occurs at root and stem tips....
Read More →Describe the legacy of the French Revolution for the peoples
[question] Question. Describe the legacy of the French Revolution for the peoples of the world during the nineteenth and twentieth centuries. [/question] [solution] Solution: The French Revolution bore a rich legacy for the peoples of the world during the nineteenth and twentieth centuries because it was the first national movement that adopted the ideals of “liberty, equality and fraternity”. These ideas became the basic tenets of democracy for every nation in the 19th and the 20th century. The...
Read More →Name types of simple tissues.
[question] Question. Name types of simple tissues. [/question] [solution] Solution: Three – Parenchyma, collenchyma and sclerenchyma. (Meristematic tissue is also a simple tissue). [/solution]...
Read More →What is the utility of tissues
[question] Question. What is the utility of tissues in multi-cellular organisms ? [/question] [solution] Solution: (i) Division of Labour. Tissues bring about division of labour in multicellular organisms. It increases efficiency. (ii) Higher organisation. Tissues become organised to form organs and organ systems. (iii) Individual Cells. Work load of individual cells has decreased. (iv) Higher surival. Because of division of labour, higher efficiency and organisation, the multicellular organisms...
Read More →Describe the circumstances leading to the outbreak of revolutionary protest in France.
[question] Question. Describe the circumstances leading to the outbreak of revolutionary protest in France. [/question] [solution] Solution: Circumstances leading to the outbreak of revolutionary protest in France: A society of estates, and the plight of the third estate French society was divided into three distinct estates: the first estate comprising the clergy, the second estate composed of the nobility, and the third estate made up of tradesmen, merchants, court officials, lawyers, peasants...
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