Each Race receives additional bonuses to starting skill levels.

Each skill governed by the character's chosen Specialization receives an additional +5. Each of the five major skills receive +25, and each of the five minor skills receive +10. The base starting value of each skill is 5, but player choices regarding race and class modify those starting values. In the Morrowind Code Patch, there is an option to disable the caps on skills and attributes. u/qwesx comment and its derivatives answer that for you. It won't allow you to summon extra creatures. Skills can be permanently damaged (though retrainable) by jail time, and – in theory – by the Damage Skill effect, though the latter is not encountered as an effect used against the player character except in early, unpatched versions of the game. For example, if you level up Conjuration over 100, you'll just be more likely to successfully cast in dire circumstances. Unlike other games, including Oblivion, the damage range of weapons does not represent a random number. Skills are raised by using them, by paying for trainers, by reading skill books, and occasionally as quest rewards. The chance for the players attacks to hit in Morrowind varies from (very roughly speaking) about 20 at starting weapon skill to over 100 at weapon skill 100. The numbers in parentheses are what the game uses to identify the skill. Each skill also belongs to one of three specializations. Each time your character increases any combination of major or minor skills ten times, they become eligible to gain a level. Each class has five major skills, five minor skills, and seventeen miscellaneous skills. Each skill is governed by an attribute there are three to five skills governed by each attribute (except Luck). There are 27 skills in Morrowind, each of which determines how well you can perform various tasks.

Morrowind attributes over 100