Yes. There is a way of make Mobs only spawnable through eggs without automatic spawning.
There is no such seed, as seeds affect the terrain generation and not the spawning of mobs.
there is no limit to the number of diamonds. they just keep spawning like mobs but slower.
Passive mobs need light to spawn, and they only spawn on grass. If the aggressive mobs are spawning, then it must be night and the passive mobs will only spawn near torches, pumpkins, glowstone, etc. However, Notch MAY have fixed this in 1.6, but I'm not sure.
You may have your difficulty set to Peaceful. Monsters will not spawn in Peaceful mode.
Nothing! You do get some XP though, and the mobs stop spawning, but you cannot obtain the spawner.
no, some mobs can't, such as skeletons, creepers and zombies, but other mobs like spiders or endermen, climb over or just teleport in.
since the update came out (for survival mode) all you need to do is: a) wait until night or b) make a mob spawner (water+dark place=hostile mobs spawning)
No, most mobs cannot see through glass blocks and will not be able to detect players or other entities behind them. However, there are exceptions, such as the Wither and the Enderdragon, which can still detect their targets through glass.
In Pixelmon, mobs spawn based on environmental conditions, such as biome type, light levels, and available space. Clearing out trees and leaves may have reduced the available spawning spots for mobs. To increase mob spawning in your jungle biome, try planting more trees and allowing natural vegetation to grow back in certain areas.
mobs
There are many way to spawn a giant but some of the most popoular are either spawning it in via a external moding programme such as MC edit or downloading a mod like single player commands which features a command that allows to spawn in mobs such as a giant.
Herobrine is said to be the dead brother of Notch, the creator of Minecraft. It is believed he can go onto people's worlds and haunt them by spawning mobs, writing backwards messages and long tunnels lit with redstone torches. He looks like a Steve but has glowing white eyes.