Characteristics that are always present in living organisms are complexity homeostasis metabolism heredity movement cells sensitivity reproduction

homeostasis

metabolism

heredity

cells

reproduction

Explanation:

There are certain characters that all living organisms possess and these are as follows :

1. Homeostasis - An organism can change internally or externally concerning the changes that take place in the environment.

2. Metabolism - The ability to obtain nutrients, take in oxygen and transform the nutrition and oxygen into energy and cellular components.

3. Heredity - The ability to pass on characteristics possessed by an organism whether physical or mental to their offspring is called heredity, 

4. Cells- are living organism is made up of the basic structural and functional unit of life called a cell. 

5. Reproduction - every living organism is capable of reproducing whether sexually or asexually and thus give rise to new individuals. 

i think the miocene epoch spans the time from 23 million to 12 million years ago.

explanation:

b,bacteria convert nitrates

into nitrogen gas.

d,plants and animals take in

and use nitrogen compounds.

e,bacteria break down waste    

products and return nitrogen  

to the soil.

a,bacteria convert atmospheric

nitrogen to ammonia.

c,bacteria convert ammonia

to nitrites and nitrates.