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Comets: Dirty snowballs, Coma and two tails, Orbits Vary

Asteroids: Between Mars and Jupiter,

Meteoroids: Irregular shapes,

( I believe those are the right answers ) ( Hopefully)

Explanation:

Comets: Have 2 tails, are dirty snowballs

Asteroids: Orbits may vary, have irregular shapes

Meteoroids: Most are pebble sized

Explanation:

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.

organ system-an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.