List of top Science Questions

How is a prokaryotic cell different from a eukaryotic cell?
Define the term “tissue”.
What would happen if the plasma membrane ruptures or breaks down?
How many types of elements together make up the xylem tissue? Name them.
What would happen to the life of a cell if there was no Golgi apparatus?
Which organelle is known as the powerhouse of the cell? Why?
Where do the lipids and proteins constituting the cell membrane get synthesized?
How are simple tissues different from complex tissues in plants?
How does an Amoeba obtain its food?
What is osmosis?
Carry out the following osmosis experiment: Take four peeled potato halves and scoos each one out to make potato cups. One of these potato cups should be made from a boiled potato. Put each potato cup in a trough containing water. Now, 
  1. Keep cup A empty 
  2. Put one teaspoon sugar in cup B 
  3. Put one teaspoon salt in cup C 
  4. Put one teaspoon sugar in the boiled potato cup D. Keep these for two hours. Then observe the four potato cups and answer the following: 
  1. Explain why water gathers in the hollowed portion of B and C. 
  2.  Why is potato A necessary for this experiment? 
  3. Explain why water does not gather in the hollowed-out portions of A and D.
Differentiate between parenchyma, collenchyma and sclerenchyma on the basis of their cell wall.
Which type of cell division is required for growth and repair of body and which type is involved in formation of gametes?
An athlete completes one round of a circular track of diameter  \(200 \;m\) in \(40 \;s\). What will be the distance covered and the displacement at the end of \(2\) minutes \(20\) \(s\)?
Which of the following has more inertia: (a) a rubber ball and a stone of the same size? (b) a bicycle and a train? (c) a five-rupees coin and a one-rupee coin?
A battery lights a bulb. Describe the energy changes involved in the process.
Identify the type of tissue in the following:
skin, bark of tree, bone, lining of kidney tubule, vascular bundle.
Explain any one method of crop production which ensures high yield.
A mass of 10 kg is at a point A on a table. It is moved to a point B. If the line joining A and B is horizontal, what is the work done on the object by the gravitational force? Explain your answer.
Why are manure and fertilizers used in fields?
The potential energy of a freely falling object decreases progressively. Does this violate the law of conservation of energy? Why?
What are the advantages of inter-cropping and crop rotation?
In the following example, try to identify the number of times the velocity of the ball changes: “A football player kicks a football to another player of his team who kicks the football towards the goal. The goalkeeper of the opposite team collects the football and kicks it towards a player of his own team”. Also identify the agent supplying the force in each case.
What is genetic manipulation? How is it useful in agricultural practices?
Name the regions in which parenchyma tissue is present.