с дз 5. Form the derivatives from the following words,

1. biology (биология) -

(биолог)

2. elegant (элегантный) -

(элегантность)

3. to present (присутствовать) -

.(присутствие)

4. to depend (зависеть) -

5. to differ (различаться) -​

1. biology (биология) - биолог
To form the derivative "биолог" from the word "биология", we need to remove the ending "-ия" and replace it with the ending "-ог".

2. elegant (элегантный) - элегантность
To form the derivative "элегантность" from the word "элегантный", we need to remove the ending "-ый" and replace it with the ending "-ность".

3. to present (присутствовать) - присутствие
To form the derivative "присутствие" from the word "присутствовать", we need to remove the ending "-овать" and replace it with the ending "-ие".

4. to depend (зависеть) - зависимость
To form the derivative "зависимость" from the word "зависеть", we need to remove the ending "-еть" and replace it with the ending "-имость".

5. to differ (различаться) - различие
To form the derivative "различие" from the word "различаться", we need to remove the ending "-аться" and replace it with the ending "-ие".

Explanation:
In Russian, we can form derivatives by changing the endings of words. The new endings indicate a different form or meaning of the word. To form derivatives, we need to identify the base or stem of the word and add the appropriate ending. In each of the given examples, we determine the base or stem of the word and then choose the correct ending to form the derivative.