Thalassemia is a hereditary condition that affects the blood which leads to an abnormal form of haemoglobin. Haemoglobin is an important protein molecule present in RBC that carries oxygen. This disorder leads to the destruction of RBC which leads to anaemia.

• It is caused due to absence or excess or abnormal arrangement of one or more chromosomes.
• Aneuploidy – failure of segregation of chromatids during cell division cycle results in the gain or loss of chromosome.
• Polyploidy – Failure of cytokinesis after telophase stage of cell division results in an increase in a whole set of chromosomes in an organism.
• Down’s syndrome – gain of extra copy of chromosome 21 (trisomy 21)
• It was first described by Langdon Down (1866).
• Affected individual is short with small round head, furrowed tongue and partially open mouth.
• Broad palm with characteristic palm crease.
• Physical, psychomotor and mental development is retarded.

Homeostasis is the ability to maintain internal stability in an organism in response to the environmental changes. The internal temperature of the human body is the best example of homeostasis.

bro check the youtube channel dk english pathsala

The narration of this story is by a French boy, Franz. Franz is a lazy boy. However, in spite of his laziness, Franz likes to play and is of a sensitive nature. Furthermore, Franz hates his teacher M. Hamel in his school and has no interest in studying French. An order has come from Berlin after taking over the districts of Alsace and Lorraine in France that the German language rather than the French should be taught in the schools there. Furthermore, it is the school French teacher M. Hamel’s last day. This teacher has been working there for forty years. Moreover, the teacher has feelings of patriotism. He is also full of nostalgia and grief. The village men also attend his ‘last lesson’ so as to honour and respect him. The village is regretting and is sad that they didn’t learn their mother tongue in their childhood. Franz receives a big shock when he learns that this is his last lesson in French. He is shocked because he does not know French. Furthermore, on learning about the last lesson, a sudden interest arises in him for learning French. Moreover, he pays careful attention and learns everything taught on this last day. Instantly, he develops liking for the teacher M. Hamel. His feelings of hatred for him suddenly came to an end. Moreover, Franz develops respect for the hard work and sincerity of his teacher. Franz is sad and ashamed for being unable to recite his lesson. Hamel explains that they all are at fault for lacking eagerness to learn. Furthermore, he also includes himself in this fault. He blames himself for lack of sincerity in teaching them. There is a reflection of his patriotism in his praise for the French language. He says that the French language is the most logical and beautiful language in the world. It seems that M. Hamel got emotional on this occasion. Furthermore, he asks the class to guard their language. He says that being close to one’s language is a way to escape the clutches of slavery. This language will assist them in attaining freedom from the Germans. The people realize the significance of their mother tongue. Moreover, they feel the reason for their defeat is illiteracy. Franz feels that it is impossible to remove one’s language from a person. This is because it is something that is natural to a person. This means that no matter how hard the opposition may try, they will fail to remove one’s language. Conclusion of the Last Lesson Summary The Last Lesson summary reflects on the importance of one’s language for any race and why it is crucial to safeguard it. Maybe it will help u

Mendel selected a pea plant because of the following features.

(a) Peas have many visible contrasting characters such as tall/dwarf plants, round/wrinkled seeds, green/yellow pod, purple/white flowers, etc.
(b) Peas have bisexual flowers and therefore undergo self pollination easily. Thus, pea plants produce offsprings with same traits generation after generation.

(c) In pea plants, cross pollination can be easily achieved by emasculation in which the stamen of the flower is removed without affecting the pistil.

(d) Pea plants have a short life span and produce many seeds in one generation.

Glad

At the centre of the circular loop, The magnetic field lines are straight. Each segment of circular loop carrying current produces magnetic field lines in the same direction with in the loop. The direction of magnetic field at the centre of circular coil is perpendicular to the place of the coil.

Currency appreciation usually reduces inflation because imports become cheaper and the lower prices lead to lower inflation. It makes imports more attractive, causing the demand for local products to fall. Local companies usually have to cut costs and increase productivity so they can remain competitive. Currency appreciation is an increase in the value of one currency in relation to another currency. Currencies appreciate against each other for a variety of reasons, including government policy, interest rates, trade balances and business cycles.

There are several factors that affect the population distribution in India:

1. Geographical Factors
2. Social Factors
3. Cultural Factors
4. Economic Factors

Playing 11 and 4extra

11

11

11

11

Water hyacinths are the only large aquatic herb that can float on the water unattached to the bottom. They float on bloated air-filled hollow leaf stalks. The leaves of free-floating water hyacinths are characterised by a bulbous swelling in a section of the petiole. The oxygen bubbles float to the surface of water and get released into the air which provides buoyancy.

It is the plant that grows in the standing water.....it is also called as terror of bengal

Give me answers

Yes, pollen mother cell and microspore mother cell are the same, it is present in the pollen sac of anther. well no not exactly but Pollen mothercell divides meiotically to give rise to 4 microspores in form of tetrads that mature and separate to form pollen grains(4 pollengrains from each tetrad).

Limited test ban treaty

Ltbt means "limited test ban treaty organization"" ye ek sandhi thi jo east and west European countries ne ki thi ya fir kehlo usa aur ussr ne ki thi . Iske under sirf vahi desh atomic bomb ka parishandhn karsakte hai jinke pass atomic bomb pehle se majud ho . Matlb is sandhi se pehle jis bhi desh ke pass atomic bomb present tha sirf vahi desh atomic parishan kar sakte hai

I think rulers would have made arrangement for irrigation for the following reasons:
(i) To increase agricultural production.
(ii) Land revenue was the most important source of state income. Only good crops and enough agricultural production enables the farmers to pay land revenue in time.
(iii) In ancient times agriculture was main occupation and the farmers were most important working class of the society. And the whole economy of the kingdom depended on agriculture.

The integration of the princely states raised the question of the future of the remaining colonial enclaves in India. The imprecise doctrine of paramountcy allowed the government of British India to interfere in the internal affairs of princely states individually or collectively and issue edicts that applied to all of India when it deemed it necessary. The Rajput princely state of Jodhpur was a strange case of tilting towards Pakistan despite having a Hindu king and a large Hindu population. The British ruled India with two administrative systems: British Provinces and Indian "princely" states; about 60% of the territory of the Indian sub-continent were provinces and 40% were princely states. The first step in this process, carried out between 1947 and 1949, was to merge the smaller states that were not seen by the Government of India to be viable administrative units either into neighbouring provinces, or with other princely states to create a "princely union".

Spermatogenesis

The process of formation of sperms is called spermatogenesis. It involves 3 phases- multiplication phase, growth phase, maturation phase.

• In multiplication phase, male germ cells also called as spermatogonia undergo mitotic divisions to form large number of spermatogonia.
• In growth phase, spermatogonia increases their size by accumulation of nutrition in the cytoplasm and are ready for meitoic division and the spermatocytes are called as primary spermatocytes with 46 chromosomes.
• In maturation phase- A primary spermatocyte completes the first meiotic division leading formation of two equal, haploid cells called secondary spermatocytes, which have only 23 chromosomes each and the secondary spermatocytes undergo the second meiotic division to produce four equal, haploid spermatids

The process of formation of male gamate(sperm) is called spermatogenesis

Improved technology used for harvesting food, coupled with the technology of improved sanitation, has accelerated the growth of the human population. A larger human population increases the impact on the environment and its resources, many of which are limited and non renewable. Changes in technology modify the carrying capacity of a territory as irrigation and fertilisation in agriculture, for example, or shorter rotations between crops, which increases the number of people who can be fed from the resources of a given territory. The application of the concept of carrying capacity for the human population, which exists in a non-equilibrium, has been criticized for not successfully being able to model the processes between humans and the environment.

People are mostly attracted to more of comfort .they are adapted to their own surroundings , but the fact is that today about35%of the youth prefer to live in big cities .because it is full of all basic amentities from education to medical facilities.

 

Intelligence is the results of both hereditary and environment as follows:
Hereditary: The effect of hereditary on intelligence comes from the studies on twins and adopted children. The intelligence of identical twins brought up together shows a correlation of 0.90, while identical twins reared in different environments co-relate 0.72 in term of intellectual, personality and behavioural characteristic. The intelligence of fraternal twins slows a correlation of 0.60 and that of brothers and sisters correlates 0.50. Another study shows that children's intelligence is more like their biological parents than their adoptive parents.
Environment: Studies have shown that a with the growth of children, their intelligence tends to match that of their adoptive parents. Children from disadvantaged backgrounds and adopted into higher socio-economic status families shows a large increase in their intelligence levels. Rich nutrition, good family background and quality schooling increases intelligence, while environmental deprivation lowers intelligence.

Thus, it could be concluded that intelligence is an interplay of both (nature and environment). Both hereditary and environment go hand in glove in determining intelligence.

Personality is defined as the characteristic sets of behaviors, cognitions, and emotional patterns that evolve from biological and environmental factors. While there is no generally agreed upon definition of personality, most theories focus on motivation and psychological interactions with one's environment. Personality is the combination of behavior, emotion, motivation, and thought patterns that define an individual. Personality psychology attempts to study similarities and differences in these patterns among different people and groups. The four temperament theory is a proto-psychological theory which suggests that there are four fundamental personality types: sanguine, choleric, melancholic, and phlegmatic.