Questions

Covalent bonds are bonds formed between two non metals by sharing of electrons in their outer most orbits for stable.

Tetrad is a homologous chromosome pair in the given options. A homologous chromosome pair is a pair of chromosomes one from father and one from mother that has same gene sequence after the process of meiosis.

The Nobel Peace Prize is awarded in Oslo city in Norway while other Nobel Prizes in Physics, Chemistry, Literature, Medicine,... are awarded in Stockholm, Sweden.

Burns are classified into 4 degrees. They are ::

1. First-degree (superficial) burns. First-degree burns affect only the epidermis, or outer layer of skin.

2. Second-degree (partial thickness) burns. Second-degree burns involve the epidermis and part of the dermis layer of skin.

3. Third-degree (full thickness) burns.

4. Fourth-degree burns.

Blisters are a sign of Second-degree burns.