General Science Questions

A clade is a group of ancestral species and all its descendants. Hence it is a branch of one same species and so monophyletic.

An enzyme speeds up a reaction by lowering the activation energy which is done by catalysts to increase the rate.

PTH - Parathyroid hormone which balances calcium levels if they are low.

In all the fatal accidents, 30% of them are with speeding factor.

When water is cooled from 4°C to 0°C, its density decreases.

When water cools from 4°C to 0°C, ice crystals begin to form because the water is approaching its freezing point. When water freezes, the water molecules form a lattice that increases the volume. As a result, the density decreases. This is why ice will float on top of water; ice has a lower density than the water.

The term for classifying and grouping organisms is Taxonomy. It is the science of defining and naming groups of biological organisms on the basis of shared characteristics.

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.