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Posted by Divy Thakkar 5 years, 7 months ago
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Yogita Ingle 5 years, 7 months ago
This process of formation of embryo sac from a single megaspore is termed as Monosporic development.
Following changes lead to Monosporic development:
- Nucleus undergo mitotic division
- 2-nucleate embryo-sac is formed
- Nuclei undergo mitotic division again
- 4-nucleate embryo-sac is formed
- Nuclei undergo yet another mitotic division
- 8-nucleate embryo-sac is formed
- Cell wall formation takes place
- Embryo sac is formed
Posted by Divy Thakkar 5 years, 7 months ago
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Posted by Divy Thakkar 5 years, 7 months ago
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Posted by Neha Singh 5 years, 7 months ago
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Shailesh Panday 5 years, 6 months ago
Posted by Samaira Sam 5 years, 7 months ago
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Hemant Choudhary 5 years, 6 months ago
Posted by Ølí ?? 5 years, 7 months ago
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Meghna Thapar 5 years, 7 months ago
Malaria is caused by the Plasmodium parasite. The parasite can be spread to humans through the bites of infected mosquitoes. There are many different types of plasmodium parasite, but only 5 types cause malaria in humans. The phylum Apicomplexa contains several important pathogens such as Plasmodium falciparum, the causative agent of the most dangerous form of human malaria. Human cerebral malaria (HCM) is the most severe complication of P. falciparum infection and has attracted the attention of both clinicians and scientists since the discovery of the malaria parasite. HCM can occur in less than two weeks after a mosquito bite and may develop after 2 to 7 d of fever.
Posted by Aman Srivastava 5 years, 7 months ago
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Gaurav Seth 5 years, 7 months ago
Geographical Factors
(a)Availability of water: It is the most important factor for life. So, people prefer to live in areas where fresh water is easily available. Water is used for drinking, bathing and cooking – and also for cattle, crops, industries and navigation. It is because of this that river valleys are among the most densely populated areas of the world.
(b)Landforms: People prefer living on flat plains and gentle slopes. This is because such areas are favourable for the production of crops and to build roads and industries. The Ganga plains are among the most densely populated areas of the world while the mountains zones in the Himalayas are scarcely populated.
Social and Cultural Factors
Some places attract more people because they have religious or cultural significance. In the same way – people tend to move away from places where there is social and political unrest. Many a times governments offer incentives to people to live in sparsely populated areas or move away from overcrowded places.
Posted by Pardeep Kumar 5 years, 7 months ago
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Muskan Maan 5 years, 4 months ago
Posted by Nashrah Ali 5 years, 7 months ago
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Yogita Ingle 5 years, 7 months ago
Self-control is about inhibiting strong impulses; self-regulation is about reducing the frequency and intensity of strong impulses by managing stress-load and recovery.
Posted by Preeti Sikka 5 years, 7 months ago
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Meghna Thapar 5 years, 7 months ago
Amenorrhea is the absence of menstruation — one or more missed menstrual periods. Women who have missed at least three menstrual periods in a row have amenorrhea, as do girls who haven't begun menstruation by age 15. The most common cause of amenorrhea is pregnancy. In addition to changes in hormone levels, the menstrual cycle can be influenced by stress and illness. Missing one menstrual period is rarely a sign of a serious problem or medical condition, but amenorrhea for several months may be a sign of a disease or chronic condition that can contribute to infertility.
Posted by Preeti Sikka 5 years, 7 months ago
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Yangzee Sherpa 5 years, 7 months ago
Yogita Ingle 5 years, 7 months ago
Osteoporosis can be caused due to a variety of reasons such as:
- Low peak bone mass
- Low levels of testosterone and estrogen in men and women
- Imbalanced hormones
- Hyperthyroidism and other thyroid problems
- Kidney diseases, anorexia
- Surgical treatment on ovaries for its removal
- Low calcium diet
- Lack of Vitamin D
Posted by Preeti Sikka 5 years, 7 months ago
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Meghna Thapar 5 years, 7 months ago
Osteoporosis prevention begins in childhood, when a bone-healthy diet and plenty of exercise helps children achieve their highest possible 'peak bone mass'. This is important because the more bone mass you have when you reach adulthood, the less likely you are to have weak and breakable bones at older age. Green leafy vegetables: broccoli, kale, collard greens, dried figs, turnip greens, and mustard greens. Fish: canned salmon and sardines with the bones. Nuts: almonds and Brazil nuts. Enriched foods: cereals, orange juice, beverages, and breads that have calcium added to them.
Posted by Preeti Sikka 5 years, 7 months ago
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Yogita Ingle 5 years, 7 months ago
The main sign of amenorrhea is the absence of menstrual periods. Depending on the cause of amenorrhea, you might experience other signs or symptoms along with the absence of periods, such as:
- Milky nipple discharge
- Hair loss
- Headache
- Vision changes
- Excess facial hair
- Pelvic pain
- Acne
Posted by Prisha Rathore 5 years, 7 months ago
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Abhishek Mundyal 5 years, 7 months ago
Yangzee Sherpa 5 years, 7 months ago
Sonam Mishra 5 years, 7 months ago
Ankit Prasad 5 years, 7 months ago
Posted by Priya Singh 5 years, 7 months ago
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Posted by Ekdoteen Charpanch 5 years, 7 months ago
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Dhruv Kejriwal 5 years, 6 months ago
Ekdoteen Charpanch 5 years, 7 months ago
Posted by Sahiba Ansari 5 years, 7 months ago
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Posted by Ramesh Meghwanshi 5 years, 7 months ago
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Meghna Thapar 5 years, 7 months ago
Introducing a dielectric into a capacitor decreases the electric field, which decreases the voltage, which increases the capacitance. A capacitor with a dielectric stores the same charge as one without a dielectric, but at a lower voltage. Therefore a capacitor with a dielectric in it is more effective. The field produce due to the polarization of material minimize the effect of external field. Hence, the electric field inside a dielectric decreases when it is placed in an external electric field.
Posted by Samaira Sam 5 years, 7 months ago
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Yogita Ingle 5 years, 7 months ago
The consequences are:
(i) Collective farms were replaced by private farming and capitalism in agriculture.
(ii) Privatisation of state assets and corporate ownership patterns were immediately brought in.
(iii) Development began to be envisaged through more trade and sudden and complete switch to free trade was considered essential.
(iv) It also involved a breakup of the existing trade alliance among the countries among the countries of the Soviet bloc.
Posted by Anjali Patel 5 years, 7 months ago
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Posted by Yadav Ritik 5 years, 7 months ago
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Yangzee Sherpa 5 years, 7 months ago
Yogita Ingle 5 years, 7 months ago
| Zygote | Embryo |
| The term zygote is from Greek word “zygotos” which means to “join” | The term embryo is from Latin work “embryum” which means “that which grows” |
| Zygote is unicellular | Embryo is multicellular |
| The process of formation of zygote is known as fertilization | The process of formation of embryo is known as embryogenesis |
| In medical terms, zygote is known as zygocyte | In medical terms, embryo is known as diploid eukaryote |
Posted by Rohan Chaudhary ??? 5 years, 7 months ago
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Rohan Chaudhary ??? 5 years, 6 months ago
Khushi Shahi 5 years, 7 months ago
Posted by Rohan Chaudhary ??? 5 years, 7 months ago
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Rohan Chaudhary ??? 5 years, 6 months ago
Ankit Prasad 5 years, 7 months ago
Posted by Ølí ?? 5 years, 7 months ago
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Yogita Ingle 5 years, 7 months ago
The harmful alleles get eliminated from population over a period of time, yet sickle cell anaemia is persisting in human population because SCA is a harmful condition which is also a potential saviour from malaria.
Those with the benign sickle trait possess a resistance to malarial infection. The pathogen that causes the disease spends part of its cycle in the red blood cells and triggers an abnormal drop in oxygen levels in the cell. In carriers, this drop is sufficient to trigger the full sickle-cell reaction, which leads to infected cells being rapidly removed from circulation and strongly limiting the infection’s progress. These individuals have a great resistance to infection and have a greater chance of surviving outbreaks. This resistance to infection is the main reason the SCA allele and SCA disease still exist. It is found in greatest frequency in populations where malaria was and is still often a serious problem.
Posted by Amritanshu Srivastav 5 years, 7 months ago
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Yangzee Sherpa 5 years, 7 months ago
Posted by Shivani Kumari 5 years, 7 months ago
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Usha Yadav 5 years, 6 months ago
Usha Yadav 5 years, 6 months ago
Riya Kavathe 5 years, 7 months ago
Posted by Aanya Gupta 5 years, 7 months ago
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Meghna Thapar 5 years, 7 months ago
In the Fahrenheit scale, the freezing of water is defined at 32 degrees, while the boiling point of water is defined to be 212 degrees. The Fahrenheit scale measures temperature. It is based on a scale proposed in 1724 by physicist Daniel Gabriel Fahrenheit (1686-1736). The unit of this scale is the degree Fahrenheit (°F). On this scale, water’s freezing point is defined to be 32 degrees, while water’s boiling point is defined to be 212 degrees. The kelvin is a unit of measurement for temperature; the null point of the Kelvin scale is absolute zero, the lowest possible temperature. The kelvin is a unit of measurement for temperature. It is one of the seven base units in the International System of Units (SI) and is assigned the unit symbol K. The Kelvin scale is an absolute, thermodynamic temperature scale using absolute zero as its null point. In the classical description of thermodynamics, absolute zero is the temperature at which all thermal motion ceases.
Posted by Nisa Saini 5 years, 7 months ago
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Nishant Pandey 5 years, 7 months ago
Posted by Bijay Limbu 5 years, 7 months ago
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Meghna Thapar 5 years, 7 months ago
Reliability is concerned with the ability of a network to carry Reliability is concerned with the ability of a network to carry out a desired operation such as "communication". The reliability of network is related to several factors, such as hardware equipment, software services, human factors and so on. Most previous papers pay more attention on the hardware equipment factors than the others. The reliability of network is measured by if the equipment is normal running.
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