Structure of the Atom — Science STD 9 — Question

The isotopes of an element have different number of:

Which one of the following possesses kinetic energy?

A disease transmitted through sexual contact is:

1. HIV.
2. Gonorrhoea.
3. Syphylis.
4. All the above.

When a balloon held between the hands is pressed, its shape changes. This happens because:

The idea ‘omins cellula e cellula’ which means that all living cells arise from preecisting cells was given by:

1. Robery Brown
2. Purkinje
3. Rudolf Virchow
4. Schleiden

Which of the following have been artificially selected?

1. Cabbage
2. Cauliflower
3. Broccoli
4. All of these.

Assertion: Cells vary greatly in their shape.
Reason: The shape of cell does not depend on the function they perform.

Which cell organelle is called the 'Suicidal bag of the cell':

Which of the following is the largest phylum?

1. Arthropoda.
2. Ametida.
3. Mollusca.
4. Cnidaria.