I believe its half the number of the parents.
Replication - it makes a copy of itself during cell division
This depends on the stimulus. if it is a positive stimuli like smell of food, the animal will look for it, if its negative (being frightened) the animal will fight or run
It can affect the environment a little because it is explaining what it can do over the time when the evolution grows
Hope this helps :)
Molecules are moving because they have energy. As the liquid cools down, the amount of energy is reduced and the molecules start to move slower. When the water temperature reaches around 0°C, the molecules stick together and form a solid – ice. Even in this solid stage, the molecules are still moving – we just can’t see it.