Lysosomes contain digestive enzymes for almost all types of organic materials. If their covering membrane breaks as it happens during injury to cell, the digestive enzymes will spill over the cell contents and digest the same. As lysosomes are organelles which on bursting can kill cells possessing tRead more
Lysosomes contain digestive enzymes for almost all types of organic materials. If their covering membrane breaks as it happens during injury to cell, the digestive enzymes will spill over the cell contents and digest the same. As lysosomes are organelles which on bursting can kill cells possessing them, they are called suicide bags.
(i) When the axis of the monsoon trough lies over the plains, rainfall is good in these parts. On the other hand whenever the axis shifts closer to the Himalayas, there are longer dry spells in the plains and widespread rain in the mountainous areas. (ii) The frequency and intensity of tropical deprRead more
(i) When the axis of the monsoon trough lies over the plains, rainfall is good in these parts. On the other hand whenever the axis shifts closer to the Himalayas, there are longer dry spells in the plains and widespread rain in the mountainous areas.
(ii) The frequency and intensity of tropical depressions too, determine the amount and duration of monsoon rains The depressions follow the axis of the monsoon trough of low pressure.
Withdrawal or the retreat of the monsoon is a more gradual process. The withdrawal of the monsoon begins in the north-western states of India by early September. By mid-October, it withdraws completely from the northern half of the peninsula. The withdrawal from the southern half of the peninsula isRead more
Withdrawal or the retreat of the monsoon is a more gradual process. The withdrawal of the monsoon begins in the north-western states of India by early September. By mid-October, it withdraws completely from the northern half of the peninsula. The withdrawal from the southern half of the peninsula is fairly rapid. By early December, the monsoon withdraws from the rest of the country. In the islands, the withdrawal takes place progressively from north to south from the first week of December to the first week of January.
The western cyclonic disturbances are weather phenomena of the winter months brought in by the westerly flow from the Mediterranean region. They usually influence the weather of the north and north-western regions of India. Tropical cyclones occur during the monsoon as well as in October-November, aRead more
The western cyclonic disturbances are weather phenomena of the winter months brought in by the westerly flow from the Mediterranean region. They usually influence the weather of the north and north-western regions of India. Tropical cyclones occur during the monsoon as well as in October-November, and are part of the easterly low. These disturbances affect the coastal regions of the country. They sometimes cause disasters on Orissa and Andhra Pradesh coasts.
The types of houses which are built in Rajasthan, in the Terai region, Goa and Mangalore, Assam and the reasons there of are as mentioned below: (i) The houses in Rajasthan have thick walls and flat roofs. The main reason is that it is an area with randy plains covered with sand dunes which receivesRead more
The types of houses which are built in Rajasthan, in the Terai region, Goa and Mangalore, Assam and the reasons there of are as mentioned below:
(i) The houses in Rajasthan have thick walls and flat roofs. The main reason is that it is an area with randy plains covered with sand dunes which receives very little rainfall. People experience the highest diurnal range of temperature. So to protect themselves from heat and cold, they build houses with thick walls and fat roofs.
(ii) The houses in the Terai region, in Goa and Mangalore have sloping roofs, which is due to heavy snowfall and rainfall in these areas.
(iii) The houses in Assam are built on stilts because there is maximum rainfall in the northeastern part of the country due to the southwest. monsoon. Sometimes, it causes heavy flood. So, the houses in Assam are built on stilts to avoid damage during the floods.
(a) Coriolis force: Coriolis force is an apparent force caused by the earth's rotation The Coriolis force is responsible for deflecting winds towards the right in the northern hemisphere and towards the left in the southern hemisphere This is also known as ‘Ferrel’s Law’. (b) Jet stream: There are aRead more
(a) Coriolis force: Coriolis force is an apparent force caused by the earth’s rotation The Coriolis force is responsible for deflecting winds towards the right in the northern hemisphere and towards the left in the southern hemisphere This is also known as ‘Ferrel’s Law’.
(b) Jet stream: There are a narrow belt of high altitude above 12.000 westerly wind in the troposphere- Their speed varies from about 110 km/h in summer to about 154 km/h in Winter Number of separate streams have been identified The most constant are the multitude and the subtropical jet stream.
In the tropics, moist air heated by the sun rises, sheds its moisture to give tropical mains. It then moves away from the equator. Where this dry air returns to the ground, it brings Almost no rain and produces deserts. Desert geography is controlled ultimately by precipitation physics. Sheer remoteRead more
In the tropics, moist air heated by the sun rises, sheds its moisture to give tropical mains. It then moves away from the equator. Where this dry air returns to the ground, it brings Almost no rain and produces deserts. Desert geography is controlled ultimately by precipitation physics. Sheer remoteness from oceanic moisture source may be dominating factor for the location of deserts in the western margins of the continents in the subtropics.
Ans. There are variations in the form, types as well as amount and the seasonal distribution as given below: (a) Form: Precipitation is mostly in the form of snow-fall in the upper parts of Himalayas. It, however, rains over the rest of the country. (b) Variations in amount: The annual precipitationRead more
Ans. There are variations in the form, types as well as amount and the seasonal distribution as given below:
(a) Form: Precipitation is mostly in the form of snow-fall in the upper parts of Himalayas. It, however, rains over the rest of the country.
(b) Variations in amount: The annual precipitation varies from over 400 cm in Meghalaya to less than 10 cm in Ladakh and western Rajasthan.
(c) Difference in period : Most parts of the country receive rainfall from June to September. But some parts like the Tamil Nadu coast get most of its rain during October and November.
(d) Less contrasts in coastal areas: In general, coastal areas experience less contrasts in temperature conditions. Seasonal contrasts are more in the interior of the country. There is decrease in rainfall generally from east to west in Northern plains.
(e) Effects of precipitation: The variations in precipitation have given rise to variety in lives of people in terms of the food they eat, the clothes they wear and also the kind of houses they live in. For example, the houses in Rajasthan have thick walls and flat roofs while the houses in the Tarai region have sloping roofs.
(i) The village of Sukhomajri and the district of Jhabua have shown that it is possible to reverse land degradation by plantation of trees. Tree density in Sukhomajri increased from 13 per hectare in 1976 to 1,279 per hectare in 1992. (ii) Regeneration of the environment has led to economic well-beiRead more
(i) The village of Sukhomajri and the district of Jhabua have shown that it is possible to reverse land degradation by plantation of trees. Tree density in Sukhomajri increased from 13 per hectare in 1976 to 1,279 per hectare in 1992.
(ii) Regeneration of the environment has led to economic well-being of the people. The annual average household income in Sukhomajri ranged from ` 10,000-15,000 between 1979 and 1984.This was due to greater resource availability, improved agriculture and animal care.
(iii) Madhya Pradesh government has made people the decision makers because their participation is essential for ecological restoration. Thus, 2.9 million hectares or 1 per cent of India’s land area are being greened across the state through watershed management.
The measures for soil conservation are as follows: (a) Contour ploughing i.e., ploughing along the contour lines decelerate the flow of water down the slopes. (b) Terrace cultivation: Steps are cut on the slopes making terraces which restrict erosion. It is done in western and central Himalayas. (c)Read more
The measures for soil conservation are as follows:
(a) Contour ploughing i.e., ploughing along the contour lines decelerate the flow of water down the slopes.
(b) Terrace cultivation: Steps are cut on the slopes making terraces which restrict erosion. It is done in western and central Himalayas.
(c) Strip cropping It divides large fields into strips. Strips of grass are left to grow between the crops.
(d) Planting of trees to create shelters are called shelter belts. These shelter belts help in stabilising the desert in western India.
Why are lysosomes known as suicide bags?
Lysosomes contain digestive enzymes for almost all types of organic materials. If their covering membrane breaks as it happens during injury to cell, the digestive enzymes will spill over the cell contents and digest the same. As lysosomes are organelles which on bursting can kill cells possessing tRead more
Lysosomes contain digestive enzymes for almost all types of organic materials. If their covering membrane breaks as it happens during injury to cell, the digestive enzymes will spill over the cell contents and digest the same. As lysosomes are organelles which on bursting can kill cells possessing them, they are called suicide bags.
See lessWhat are the causes for good rainfall and longer dry spells during the rainy season or the advancing monsoon?
(i) When the axis of the monsoon trough lies over the plains, rainfall is good in these parts. On the other hand whenever the axis shifts closer to the Himalayas, there are longer dry spells in the plains and widespread rain in the mountainous areas. (ii) The frequency and intensity of tropical deprRead more
(i) When the axis of the monsoon trough lies over the plains, rainfall is good in these parts. On the other hand whenever the axis shifts closer to the Himalayas, there are longer dry spells in the plains and widespread rain in the mountainous areas.
See less(ii) The frequency and intensity of tropical depressions too, determine the amount and duration of monsoon rains The depressions follow the axis of the monsoon trough of low pressure.
Write a short note on the withdrawal of monsoon.
Withdrawal or the retreat of the monsoon is a more gradual process. The withdrawal of the monsoon begins in the north-western states of India by early September. By mid-October, it withdraws completely from the northern half of the peninsula. The withdrawal from the southern half of the peninsula isRead more
Withdrawal or the retreat of the monsoon is a more gradual process. The withdrawal of the monsoon begins in the north-western states of India by early September. By mid-October, it withdraws completely from the northern half of the peninsula. The withdrawal from the southern half of the peninsula is fairly rapid. By early December, the monsoon withdraws from the rest of the country. In the islands, the withdrawal takes place progressively from north to south from the first week of December to the first week of January.
See lessWrite a short note on the western cyclonic disturbances.
The western cyclonic disturbances are weather phenomena of the winter months brought in by the westerly flow from the Mediterranean region. They usually influence the weather of the north and north-western regions of India. Tropical cyclones occur during the monsoon as well as in October-November, aRead more
The western cyclonic disturbances are weather phenomena of the winter months brought in by the westerly flow from the Mediterranean region. They usually influence the weather of the north and north-western regions of India. Tropical cyclones occur during the monsoon as well as in October-November, and are part of the easterly low. These disturbances affect the coastal regions of the country. They sometimes cause disasters on Orissa and Andhra Pradesh coasts.
See lessDescribe the different types of houses that are built in Rajasthan, in the Terai region, Goa and Mangalore and in Assam. What are the reasons for these differences?
The types of houses which are built in Rajasthan, in the Terai region, Goa and Mangalore, Assam and the reasons there of are as mentioned below: (i) The houses in Rajasthan have thick walls and flat roofs. The main reason is that it is an area with randy plains covered with sand dunes which receivesRead more
The types of houses which are built in Rajasthan, in the Terai region, Goa and Mangalore, Assam and the reasons there of are as mentioned below:
See less(i) The houses in Rajasthan have thick walls and flat roofs. The main reason is that it is an area with randy plains covered with sand dunes which receives very little rainfall. People experience the highest diurnal range of temperature. So to protect themselves from heat and cold, they build houses with thick walls and fat roofs.
(ii) The houses in the Terai region, in Goa and Mangalore have sloping roofs, which is due to heavy snowfall and rainfall in these areas.
(iii) The houses in Assam are built on stilts because there is maximum rainfall in the northeastern part of the country due to the southwest. monsoon. Sometimes, it causes heavy flood. So, the houses in Assam are built on stilts to avoid damage during the floods.
Explain the following terms: (a) Coriolis force (b) Jet stream
(a) Coriolis force: Coriolis force is an apparent force caused by the earth's rotation The Coriolis force is responsible for deflecting winds towards the right in the northern hemisphere and towards the left in the southern hemisphere This is also known as ‘Ferrel’s Law’. (b) Jet stream: There are aRead more
(a) Coriolis force: Coriolis force is an apparent force caused by the earth’s rotation The Coriolis force is responsible for deflecting winds towards the right in the northern hemisphere and towards the left in the southern hemisphere This is also known as ‘Ferrel’s Law’.
See less(b) Jet stream: There are a narrow belt of high altitude above 12.000 westerly wind in the troposphere- Their speed varies from about 110 km/h in summer to about 154 km/h in Winter Number of separate streams have been identified The most constant are the multitude and the subtropical jet stream.
Why most of the world’s deserts are located in the western margins of continents in the subtropics?
In the tropics, moist air heated by the sun rises, sheds its moisture to give tropical mains. It then moves away from the equator. Where this dry air returns to the ground, it brings Almost no rain and produces deserts. Desert geography is controlled ultimately by precipitation physics. Sheer remoteRead more
In the tropics, moist air heated by the sun rises, sheds its moisture to give tropical mains. It then moves away from the equator. Where this dry air returns to the ground, it brings Almost no rain and produces deserts. Desert geography is controlled ultimately by precipitation physics. Sheer remoteness from oceanic moisture source may be dominating factor for the location of deserts in the western margins of the continents in the subtropics.
See lessWrite a short note on precipitation in India.
Ans. There are variations in the form, types as well as amount and the seasonal distribution as given below: (a) Form: Precipitation is mostly in the form of snow-fall in the upper parts of Himalayas. It, however, rains over the rest of the country. (b) Variations in amount: The annual precipitationRead more
Ans. There are variations in the form, types as well as amount and the seasonal distribution as given below:
See less(a) Form: Precipitation is mostly in the form of snow-fall in the upper parts of Himalayas. It, however, rains over the rest of the country.
(b) Variations in amount: The annual precipitation varies from over 400 cm in Meghalaya to less than 10 cm in Ladakh and western Rajasthan.
(c) Difference in period : Most parts of the country receive rainfall from June to September. But some parts like the Tamil Nadu coast get most of its rain during October and November.
(d) Less contrasts in coastal areas: In general, coastal areas experience less contrasts in temperature conditions. Seasonal contrasts are more in the interior of the country. There is decrease in rainfall generally from east to west in Northern plains.
(e) Effects of precipitation: The variations in precipitation have given rise to variety in lives of people in terms of the food they eat, the clothes they wear and also the kind of houses they live in. For example, the houses in Rajasthan have thick walls and flat roofs while the houses in the Tarai region have sloping roofs.
What is the state of India’s environment as depicted by the village Sukhomajri and the district of Jhabua?
(i) The village of Sukhomajri and the district of Jhabua have shown that it is possible to reverse land degradation by plantation of trees. Tree density in Sukhomajri increased from 13 per hectare in 1976 to 1,279 per hectare in 1992. (ii) Regeneration of the environment has led to economic well-beiRead more
(i) The village of Sukhomajri and the district of Jhabua have shown that it is possible to reverse land degradation by plantation of trees. Tree density in Sukhomajri increased from 13 per hectare in 1976 to 1,279 per hectare in 1992.
See less(ii) Regeneration of the environment has led to economic well-being of the people. The annual average household income in Sukhomajri ranged from ` 10,000-15,000 between 1979 and 1984.This was due to greater resource availability, improved agriculture and animal care.
(iii) Madhya Pradesh government has made people the decision makers because their participation is essential for ecological restoration. Thus, 2.9 million hectares or 1 per cent of India’s land area are being greened across the state through watershed management.
Describe measures of soil conservation.
The measures for soil conservation are as follows: (a) Contour ploughing i.e., ploughing along the contour lines decelerate the flow of water down the slopes. (b) Terrace cultivation: Steps are cut on the slopes making terraces which restrict erosion. It is done in western and central Himalayas. (c)Read more
The measures for soil conservation are as follows:
See less(a) Contour ploughing i.e., ploughing along the contour lines decelerate the flow of water down the slopes.
(b) Terrace cultivation: Steps are cut on the slopes making terraces which restrict erosion. It is done in western and central Himalayas.
(c) Strip cropping It divides large fields into strips. Strips of grass are left to grow between the crops.
(d) Planting of trees to create shelters are called shelter belts. These shelter belts help in stabilising the desert in western India.