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A CHILD GETS an EXTRA CHROMOSOME 21........

It affects our URINE system CAUSING infection.It can EVEN cause urine to FLOW back and pressure damages our body.It can even cause stone formation in kidney.

In which the green plants MAKE FOOD in the presence of sunlight also known as white LIGHT...

Nitrogen is essential for the synthesis of proteins in plants and animals. ATMOSPHERIC air contains about 79 per cent nitrogen, but it is not of much use for plants and animals. Animals need nitrogen inthe form of amino acids to form proteins, and plants in the form of SOLUBLE salts, nitrates for the synthesis of amino acids and proteins.  Nitrogen compounds from dead and organisms, animal excreta are broken down into ammonia by bacteria. Theses bacteria are chemosynthetic bacteria. Ammonia is converted into soluble ammonium compounds, which break down into NH4 and NH2 ions. Nitrifying bacteria (e.g., Nitrosomonas) convert ammonia into soluble nitrite in soil. Nitrobacteria convert NITRITES into nitrates. These soluble nitrates dissolve in soil water and are absorbed by the roots of plants.  Nitrogen fixation in soil and plants provides nitrogen to the plants. All photosynthetic, chemosynthetic and heterotrophic micro-organisms help in the PROCESS of nitrogen fixation. Some bacteria live freely in the soil, some LIKE Rhizobium, etc., are symbiotic live in the plants roots. These bacteria fix nitrogen into nitrates for the use of plants and bacteria on the other hand get food (carbohydrate) and O2. 

IT TAKES FASTER IN WHITE LIGHT......

IN WHICH XYLEM AND PHLOEM OCCUR ON THE DIFFERENT RADII... 

Reproduction in biology is a process by  which new individual or offspring of organism is produce. Reproduction is a fundamental FEATURE of all known life. Each individual organism exists as the result of reproduction. even you and me. 
There are two forms of 'Reproduction' which is asexual and SEXUAL reproduction.
In asexual reproduction, an organism can reproduce without the INVOLVEMENT of another organism. Asexual reproduction is not limited to single-celled ORGANISMS. The cloning of an organism is a form of asexual reproduction. By asexual reproduction an organism creates a genetically similar or identical copy of itself.
Sexual reproduction typically requires the sexual interaction of two organisms or gametes of the same species, one from each sex, to produce offspring organisms whose genetic chracteristics are derived from those of the parent organisms.
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Because ADRENALINE mobolizes the body to face the INCOMING danger by FIGHTING with it or running away from it. So the HEART beat increases and then decreases.

The taj mahal is the seven wonders of world.but DUE to mathura refiner its marbels are going from WHIT to yellow.thus there was banned at mathura refinery in order to protect our heritage . but by PROPER care and everyday WASHING its whiteness came back .Thus
Mathura refinery causes damages to the Taj Mahal

Oal-burning power PLANTS provide NEARLY half (about 46 percent ...Apart from RESEARCH projects, only two relatively small coal-fired .... It leaves in the ground much of the carbon, sulfur, NITROGEN, and other elements that ...

We sneeze when we inhale a lot of dust LADEN air-when dust particles enter our nostril, it triggers a MESSAGE to the brain. The brain instructs the nasal chamber to initiate sneezing. This is a method to remove the unwanted dust particles from the nostril. sneezing is a type of defense mechanism USED by our BODY.

NATIONAL SCIENCE DAY IS CELEBRATED AS ONE OF THE MAIN  SCIENCE FESTIVALS IN INDIA EVERY YEAR DURING WHICH STUDENTS OF THE SCHOOLS AND COLLEGES DEMONSTRATE VARIOUS SCIENCE  PROJECTS AS WELL AS NATIONAL AND STATE SCIENCE INSTITUTIONS DEMONSTRATES THEIR LATEST RESEARCHES . THE CELEBRATION ALSO INCLUDES PUBLIC SPEECH ,TV TALK SHOWS ,EXHIBITION OF SCIENCE MOVIES SCIENCE EXHIBITIONS BASED ON THEMES AND CONCEPTS , WATCHING NIGHT SKY ,LIVE PROJECTS AND RESEARCH DEMONSTRATION ,DEBATES QUIZ COMPETITION ,LECTURES, SCIENCE MODELS EXHIBITIONS AND MANY MORE ACTIVITY . PLEASE MARK MY ANSWER AS THE BEST PLEASE I REQUEST U TO MARK AS BEST MY ANSWER PLEASE.

Mesoglea- it is the layer of an human eye, made up of GELATINOUS MATERIALS that separates the inner layer to the outer layer of eye (cnidarian).
2.it is translucent, NON- living part.
3.mostly made up of WATER 

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This PHENOMENON is KNOWN as PHOTOTROPISM. sunflower turn towards sun due to this phenomenon.

There is lot of difference between sperm and egg.
sperm:- it is PRODUCED by male reproductive organ. it is produced in TESTES by the hormone called testosterone.
egg:-it is produced by female reproductive organ. it is produced in OVARY by the hormone called oestrogen progesterone.
bot the cells has different parts

There are numerous differences.Platypuses are monotremes (egg-laying mammals) but kangaroos are marsupials, meaning they give birth to live young which are raised in a pouch.Platypuses feed on small invertebrates, crustaceans and insect larvae; most kangaroos are herbivores while the SMALLEST species are omnivores.Platypuses dig burrows for shelter, but most kangaroos have no set shelter.Kangaroos have large, strong HIND legs and small forepaws, and they move by hopping on their hind legs; platypuses walk close to the ground on four legs, or they SWIM, extending the retractable webbing between their toes.Female kangaroos have a pouch in the front of their abdomen, with the opening at the top; platypuses have no pouch.There are over 60 species of kangaroos, and just one species of platypus.The male platypus has a venomous spur on each of its ankles. No species of KANGAROO has any body part which is venomous.The platypus has a bill with sensitive electroreceptors which can detect even the smallest electrical impulses emitted by the tiny crustaceans and other underwater invertebrates on which it feeds. 

INTRODUCTION:Nitrificationand denitrification are the TWO major STAGES in nitrogen cycle

Thedifferences between nitrification and denitrification are as follows

This is because of TRANSPIRATION

The Pia plant has several varieties. So mendal CHOSE it for his trials.and PEA plant will give birth to ANOTHER  plant in very short TIME.

Each step or level of the food chain forms a trophic level. The autotrophs or the producers are at the first trophic level. The HERBIVORES or the primary CONSUMERS comes at the second. Small carnivores or the secondary consumers comes at third. Larger carnivores or the TERTIARY consumers FORM the fourth trophic level.Hope it helped you!!

A)  The short-BEAKED echidna and duck-billed platypus are the two animals that lay eggs. Short beaked echidna looks like porcupine, but it is completely DIFFERENT animal.

b) They serve as a connection between reptiles and mammals.

c) The mammal that GIVES BIRTH to poorly developed young ones is KANGAROO. 

We can BREATH 02
It ACTS as an AGENT to support the fire.. for more burning


O3 is poisonuss
it stops uv rays
O3 has a SMELL

The name comes from ANCIENT Greek, it MEANS "seed recepticle" or "seed vessel" because of the way their seeds develop in the a layer of surround tissue. It's a way to explain function during classification. 

Gymnosperms mean "naked seeds", like how the word Gymnasium really means "place to be naked" XD

The thallophytes (Thallophyta or Thallobionta) are a polyphyletic group of non-mobile organisms traditionally described as "thalloid plants", "relatively simple plants" or "lower plants". They were a defunct division of KINGDOM Plantae that included fungus, lichensand algae and occasionally bryophytes, BACTERIA and the Myxomycota. They have a hidden reproductive system and hence they are also called Cryptogamae (together with ferns), as OPPOSED to Phanerogamae. The thallophytes are defined as having undifferentiated bodies (thalli), as opposed to cormophytes (Cormophyta) with roots and stems.

Agriculture is very important branch of economy for the majority of developing countries. Production of the agricultural products is the main source of currency for developing countries and currency is necessary for buying some machines and equipment for development of agriculture. It is like a circle. That is why/ we all know about very DIFFICULT situation with food in developing countries. Acute food CRISIS in developing countries (for example in African or Latin America countries) continues to threaten the population. Scientists say that MALNUTRITION has very negative results for physical and mental state of the people. Malnutrition can reduce resistance diseases and it raises infant mortality. About 100 THOUSANDS children lose their sight because of the shortage of A – vitamin. When in such conditions family has more than ONE child (it is usual situation for developing countries) as a result we can see the raise of infant mortality. 63% of the Peruvian families cannot earn enough money for rational food.

1) wash your HAND often and thoroughly
2)vaccination ( rota TEQ.)
4)vaccination (rotarix)
5) good hygein and cleanliness
6)avoiding contact with the infected one
7)avoiding contact with the matter CONTAINING the stool of an infected person
8)change your CHILD's diaper or HELP him/her to use toilet