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Meghna Thapar 5 years, 8 months ago
When estrogen levels are high enough, they signal to the brain causing a dramatic increase in luteinizing hormone (LH). This spike is what causes ovulation (release of the egg from the ovary) to occur. Ovulation usually happens about 13-15 days before the start of the next period. The typical menstrual cycle is 28 days long, but each woman is different. The periods are still “regular” if they usually come every 24 to 38 days. This means that the time from the first day of your last period up to the start of your next period is at least 24 days but not more than 38 days.
Posted by Ramesh Yadav 6 years, 3 months ago
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Sourabh Garg 6 years, 3 months ago
Yogita Ingle 6 years, 3 months ago
Source organism : Bacillus thuringlensis
Target pest : cotton ball worms
Posted by Ankit Devnda 6 years, 3 months ago
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Muskaan Vig 6 years, 2 months ago
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Gaurav Seth 6 years, 3 months ago
Recombinant DNA technology involves several steps in specific sequence. These steps are as follows:
- Iisolation of DNA,
- Fragmentation of DNA by restriction endonucleases,
- Isolation of a desired DNA fragment,
- Ligation of the DNA fragment into a vector,
- Transferring the recombinant DNA into the host,
- Culturing the host cells in a medium at large scale
- Extraction of the desired product.
Posted by Rashid Husain 6 years, 3 months ago
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Gaurav Seth 6 years, 3 months ago
CBSE syllabus for 2019-20 is now available for download in CBSE official website and myCBSEguide Mobile App.
For the latest syllabus of 19 - 20 click on the below link o my cbse guide to getan idea of deleted topics :
<a href="https://mycbseguide.com/blog/cbse-released-syllabus-for-2019-20/">https://mycbseguide.com/blog/cbse-released-syllabus-for-2019-20/</a>
Posted by Arshalan Rana 6 years, 3 months ago
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Amaan Ansari 6 years, 3 months ago
Rashid Husain 6 years, 3 months ago
Amaan Ansari 6 years, 3 months ago
Posted by Dainashrre Mangsatabam 6 years, 3 months ago
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Yogita Ingle 6 years, 3 months ago
- A food chain is a series of organisms where all the organismsare dependent on next organism as a source of food.
- The series of organism take part at various biotic levels to form a food chain.
- Each step of the food chain forms a tropic level.
- The producers (green plants) are at the first tropic level.
- Primary consumers (herbivores) are at the second tropic level.
- Secondary consumers (small carnivores) constitute the third tropic level.
- Tertiary consumers (larger carnivores) form the fourth tropic level.
- Producers have the greatest number of individuals
Posted by Aadi Ahluwalia 6 years, 3 months ago
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Amol Gùpta 6 years, 3 months ago
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Mohd Harun 6 years, 3 months ago
Posted by Shubham Tiwari 6 years, 3 months ago
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Yogita Ingle 6 years, 3 months ago
Plastids are present only in plant cells. There are two types of plastids – chromoplasts (coloured plastids) and leucoplasts (white or colourless plastids). Plastids containing the pigment chlorophyll are known as chloroplasts. Chloroplasts are important for photosynthesis in plants.
The internal organisation of the plastids consists of numerous membrane layers embedded in a material called the stroma. Plastids are similar to mitochondria in external structure. Like the mitochondria, plastids also have their own DNA and ribosomes.
Posted by Hamid Hussain 6 years, 3 months ago
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John Le 6 years, 3 months ago
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Posted by Aditya Kumar Bhargava 6 years, 3 months ago
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Gaurav Seth 6 years, 3 months ago
Aminoacylation is the process of adding an activated amino acid to the acceptor arm of a transfer RNA. It is an essential step for the synthesis of protein, as it activated the amino acids (amino acid + ATP) and helps in linking them to their cognate tRNA in the presence of an enzyme aminoacyl tRNA synthetase
Posted by Deepak Rawat 6 years, 3 months ago
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Posted by A.T'S Gaming 6 years, 3 months ago
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Dharshika ??? 6 years, 3 months ago
Yogita Ingle 6 years, 3 months ago
The maturation of sperms requires the temperature 2 to 3°C lower than the normal body temperature. Hence, testes are situated in the scrotal sac outside the main body cavity.
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Sivan Karthick 6 years, 3 months ago
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