Answer
Just think critically about why (if you were an egg laying species), having a fetus/baby develop inside of you would be advantageous.
For one, eggs are much less protected from outside factors such as predators, temperature, etc than live birthed creatures. Live birth provides protection inside the mothers body from things such as heat, cold, moisture, predatory animals, etc. An egg laying animal must keep its eggs at a perfect temperature and check to make sure no other animal has eaten them.
Every organism is unique, even though the nucleotides making up DNA are all the same, because the structure is different in every organism. In other words, it's just the order in which nucleotides are placed that differs each organism from one another.
The medical term is DIAGNOSIS.
Diagnosis is a medical term which refers to the process of determining the disease condition that a patient is suffering from. Accurate diagnosis is made by examining the symptoms of the disease that the patient exhibits. Treatment can only be started after correct diagnosis has been made.
Each parent give you 23 chromosomes
Smaller droplets scatter more sunlight while large drops allow more sunlight to pass through in clouds.