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Neurons and other cells have a cell membrane, cytoplasm and a nucleus.

Puberty and adolescence are the results of sex glands in human beings. In males, testes make male sex hormones called testosterone which is associated with male puberty, which the boys attain an age of 13-14 years. In females the oestrogen hormone is responsible for all the changes associated with female puberty which the girl attains at an age of 10-12 years.

The correct answer is (ii)

The materials available naturally on earth and which are easily available and useful to human beings are called natural resources.

Everything available in our environment which can be stored and used based or its quality, capacity and utility and which becomes our heritage can be termed as Resources.

Three; Water resources, mineral resources and land resources.

Rivers, lakes, sea, etc.

Tapi, Narmada, Mahanadi, Godavari, Krishna, Kaveri, Tungabhadra, etc.

A. Rivers of north India and

B. Rivers of south India.

Affect the diet, lifestyle and nature of human beings.

Ganga, Yamuna, Sindhu, Brahmaputra, Jhelum, Chenab, Ravi, Beas, Satluj, Kosi, etc.

A. Produce hydroelectricity

B. Irrigation.

Govind Sagar, Nagarjuna Sagar, Nizam Sagar, Gandhi Sagar and Sardar Sarovar.

Because they flow from uneven plains and form waterfalls.

Dal, Wular and Kolleru.

Dal, Wular, Kolleru, Pulicat, Chilka, Sambhar and Nal Sarovar.

A. Evergreen forests,

B. Deciduous forests,

C. Coniferous forests,

D. Thorny forests,

E. Tidal forests

(D) Both A and (B)

One reason for this is that we are releasing too much CO₂ into the atmosphere. 

This has happened because of the following reasons: 

1. Combustion of fossil fuels like coal and oil in our power stations and factories; pollutants and green house gases are released.

2. Excessive felling of trees (deforestation) for using wood for various purposes and to provide land for farming, industries and urban development; thus, there are fewer trees to absorb CO₂ from the atmosphere

Produces ovum and female hormones.

There are three phases of growth and the total time required for all phases to occur is called grand period of growth.

Correct answer is (b) Log phase

Nitrogen present in the soil as nitrates, nitrites and ammonia is absorbed by plants and converted into nitrogenous organic compounds is nitrogen assimilation.

Correct answer is (c) Soybean and Tobacco

The response of plant to the influence of light for initiation of flowering is known as photoperiodism.

Industrial nitrogen fixation by Haber – Bosch Nitrate process is responsible for nitrogen found in human tissues.

The flowering response of Soybean and Maryland mammoth variety of tobacco was studied by Garner and Allard.

Nitrogen is constituent of amino acids, proteins, nucleic acid, vitamins, hormones, coenzymes, ATP and chlorophyll molecule.

Control of morphogenesis by light and phytochrome pigment is called photomorphogenesis.

Sulphur is constituent of amino acids, proteins, vitamins (mainly thaimine, biotin CoA) and Ferredoxin.

The concentration of the essential elements below which plant growth is retarded is termed as critical concentration.

1. Acidic Rocks

2. Base Rocks.

Herman Hollerith introduced the concept of punched cards.

correct answer is  In India.

Medals of Indian players in Asian Games Beijing (China), 1990.

• 12th Asian game India won 4 Gold and silver and 15 bronze Medals.
• Thirteenth Asian games in 1998 and India won 7 Gold, 11 Silver and 17 Bronze Medals.
• Fourteenth Asian games India get 14 Gold 17^Silver and 33 Bronze Medals. „
• Seventeenth Asian games were held in incheon South Koren in 2014 in these games won 57 Medals (11 Gold, 10 Silver, 36 Bronze).

It was started with the effort of Maharaja Yadvinder Singh of Patiala and Mr. G.D. Sondhi.

It was started in 1951 at New Delhi.

Transistors were used in second generation computers.

The 2008 Beijng Olympic Indian won these medals:

2012 Olympic games were held, at London. In this games Indian performed very well and won six medals as under :

2016 Olympic games were held of Rio (Brazil) in this game India won two medal as under:

History:
The Ancient Olympic Games came into existence in the Greek city of Olympia in 776 A.D. The credit for starting these games is given to Ifitus and Claustheius. The games began on full moon night in the months of August and September. The first winner of the Olympic games was Corbus. These games were organised after a year. They got banned in 394 A.D. on the orders of Roman Emperor Theodosius. The Olympic city was situated on the bank of Elfis river. It was the sacred city of Elis state. These games acquired special status in 1100 A.D., and began to be taken care of like a temple. With the beginning of the Olympic games, all battles in Greece used to be stopped. Nobody with weapons could enter Olympia. These games are related to Greek God Zeus.

Sports :
The Ancient Olympic games used to begin with race. It used to be 100 yards. In 724 A.D. the distance of the race was increased to 400 yards. In the 15th Olympic games the distance of the race was increased to 3 miles. In the 18th Olympic games Pentathlon was started. It included five games-long jump, 200-yard race, javelin throw and wrestling. In 25th Olympic games, chariot race was introduced, and in 30th Olympics, boxing, water- sports, wrestling pekprium and some other games were introduced. At first women were not allowed to participate in games, but then they were allowed to do so.

Rewards :
The winners of the games were amply rewarded. They were taken to the temple of Zeus and were presented the leaves and branches of olive tree. People would sing in their praises. The games were named after these winners. The companions of these winners would bring them home in the accompaniment of instrumental music. The country would take pride in her winners, and all Greeks would pray for good luck to all participants of these games.

End :
With the passage of time these games became more and more popular, and other countries also began to take part in these games. After the victory of Greece by Romans, these games had a severe setback. Some professionals began to take part in these games, thus giving rise to many evils in the games. On the orders of Roman Emperor Theodosius in 394 A.D., these games came to an end. In 395 A.D., the statue of the Greek god Zeus was also broken. The Olympic city got deserted. Roman Emperor Theodosius also destroyed stadiums. For some time even the relics of Olympic games and Olympic city disappeared.

The memory is which data is lost when power is removed is called volatile memory. The memory is which data is not lost when power is removed is called non-volatile memory.

Yes, Python is a Object-Oriented Language.

1.  Python is a modern powerful inter-preted language with objects, modules, threads, exceptions, and automatic memory managements.

 2.  Python was introduced to the world in the year 1991 by Guido van Rossum 

Salient features of Python are : 

o Simple & Easy :  Python is simple language & easy to learn. 

o  Free/open source:  Everybody can use python without purchasing license. 

o  High level language :  When coding in Python one need not worry about low-level details. 

o  Portable :  Python codes are Machine & platform independent. 

o  Extensible:  Python program supports usage of C/ C + + codes. 

o  Embeddable Language :  Python code can be embedded within C/C+ + codes & can be used a scripting language. 

o Standard Library :  Python standard library contains prewritten tools for programming. 

o  Built-in Data Structure :  Contains lots of data structure like lists, numbers & dictionaries.

Python scripts can be executed in two ways :

1.  Open the script1.Py in IDE Editor and run the script in the frontmost window of the Python IDE by hitting the run all button.

2.  Using command prompt by making sure PATH is appropriate directly type script name. > > > python Script1.Py

Fourth Generation is from 1971 to present (used Microprocessors).

Python is interpreted because it processed at runtime by the interpreter and you do not need to compile your program before executing it. This is similar to PERL and PHP.

Disadvantages of Python are :

1.  Python is not the best for memory intensive tasks.

2.  Python is interpreted language and is slow compared to C/C+ + or java.

3.  Python is not a great choice for a high graphic 3D game that takes up a lot of CPU.

4.  Python is evolving continuously with constant evolution there is little substantial documentation available for the language.

Artificial intelligence.

Olympic Oath:
Olympic oath taking ceremony was started in 1920 in Antwerp. In the Charter of Olympic Games 63 it has been mentioned that an outstanding sportsperson of the host country would take oath by holding comer of the flag by one hand, and raising other hand upward swear as :
“We swear that we will take part in the Olympic Games in loyal competition respecting the regulations which govern them and with the desire to participate in the true spirit of sportsmanship for the honour of our country and glory of sports.”