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Ask QuestionPosted by Jagyaseni Behera 5 years, 10 months ago
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Yogita Ingle 5 years, 10 months ago
- Food selection is based mainly on availability, convenience and time, rather than food value
- Influence of peers, mass media, prevalent body image
- Personal self-esteem and body image guide the eating behaviour
- Missing meals and snacking are very common
- Fast food joints are mainly patronized by adolescents. These spoil the appetite for regular meals and are high on calories and low on nutrients.
- Helps in achieving rapid growth and full growth potential
- Helps in timely sexual maturation
- Ensures adequate calcium deposition in the bones and helps in achieving normal bone strength
- Establishes good eating habits and sets the tone for a lifetime of healthy eating. This prevents obesity, osteoporosis (weak bones due to deficiency of calcium), and diabetes in later life.
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Anamika Sharma 5 years, 9 months ago
Yogita Ingle 5 years, 10 months ago
Metamorphosis is a biological process in which a larva transforms into an adult. It involves sudden and abrupt changes in the body structure of the animal by cell growth and differentiation. It is generally observed in amphibians (e.g., frogs) and insects (e.g., butterflies), etc.
The life cycle of a frog has three life stages.
Egg → Tadpole → adult
- Eggs Eggs are the result of external fertilisation which transform into fish like tadpoles.
- TadpoleTadpole has gills, small mouth and fish like tail to swim inside lakes and ponds.
- Frog: Tadpole grows and transforms into a small frog which is an amphibian by nature.
Manimegalai Nayakkar 5 years, 10 months ago
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Yogita Ingle 5 years, 10 months ago
Light is made up of packets of energy called photons which travel in a straight line at a very fast speed. Light can move through small apertures and holes and can change direction, but will always travel in straight lines.
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An object must vibrate with a frequency of at least 20 hertz to be able to produce audible sound. The sound within a range of 20 hertz to 20,000 hertz is called audible sound. The sounds of frequencies less than 20 hertz are called infrasonics. The sounds having too high frequencies which cannot be heard by human ear are called ultrasonic sounds or ultrasound.
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Meghna Thapar 5 years, 2 months ago
Cultivation is the act of caring for or raising plants. The word cultivation is most often used to talk about the ways that farmers take care of crops. However, in a more general sense, the verb cultivate means to improve or train someone or something.
The basic stages of cultivation include;
- Seed selection.
- Land preparation.
- Crop establishment.
- Water management.
- Nutrient management.
- Crop health management.
- Harvesting.
- Post harvest.
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