Question
What do you mean by diploid (2n) cell?
✓
Answer
- The cells in which chromosome number is double are known as diploid cells.
- Male and female gametes unite together in the process of fertilization. Their chromosomes mix together in the zygote, therefore, the chromosome number is always diploid.
- E.g. Diploid chromosome no. in human beings is 46. We hate 46 chromosomes in each of our body cells.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Draw neat labelled diagrams: Types of lenses.
Complete the table, if a metal reacts with the reagent then mark ✓ and if not then ✗.
| Metal | Ferrous sulphate | Silver nitrate | Copper sulphate | Zinc sulphate |
| Cu | ||||
| Al |
State Joule’s law about heating effect of electric current.
Electronic configuration of metal A is 2,8,1. Electronic configuration of metal B is 2,8,8,2. Which of the above metals is more reactive? Explain with reason.
Draw a neat labelled diagram. : Label the diagram.
Find the focal length of a convex lens which produces a virtual image at 10 cm from the lens when an object is placed at 5 cm from the lens.
i. Define vestigial organs.
ii. Write name of any two vestigial organs in human body.
iii. Explain how one human vestigial organ is functional in another animal.
ii. Write name of any two vestigial organs in human body.
iii. Explain how one human vestigial organ is functional in another animal.
A hard material X which is mined from the earth is used as a house hold fuel and also for the generation of electricity at Thermal Power Stations. A soft material Y is also used us a fuel in the form of candles. A gaseous material Z which occurs along with petroleum is increasingly being used as a fuel in running vehicles in its compressed form.
- What are materials, X, Y and Z?
- When materials X, Y and Z are burned separately:
- When material burns by producing a yellow, luminous flame?
- Which material ultimately burns without producing a flame?
- Which material can burn in a gas stove by producing a blue flame?
How much heat energy is necessary to raise the temperature of 5 kg of water from 20°C to 100°C?
Metals are good conductors of electricity. Explain why.