A ballet-dancer stretches her hands out for slowing down.What principle is involved in this ?

When a Snapdragon plant bearing pink colour flower was selfed, it was found that 69 plans were having red coloured flowers. What would be the number of plants bearing pink flowers and white flowers? Show with the help of Punnett square. Identify the principle of inheritance involved in this experiment.

What does PCR stand for? Write its principle and name the different steps involved in PCR.

On an educational trip to Uttarakhand, Ketki and her friends observe that many local people were having swollen necks, Please help Ketki and her friends to find out the solutions to the following questions. What effect does this condition have on pregnancy?

Conduct a survey in your neighbourhood to find out what the three most common diseases are. Suggest three steps that could be taken by your local authorities to bring down the incidence of these diseases.

Radha was running on a treadmill at a great speed for 15 minutes continuously. She stopped the treadmill and abrupty came out. For the next few minutes, she was breathing heacvily/fast. Answer the following questions. What happened to her muscles when she did strenuously exercised?