The function below takes a single string parameter: input_string. If the input contains the lowercase letter z, return the string 'has the letter z'. Otherwise, return the string 'not worthwhile'.

# string_contains function is defined with input_string

# as arguments

def string_contains(input_string):

   # if-statement that check if letter z is in input_string

   if 'z' in input_string:

       # it print"has the letter z" if it has z

       print("has the letter z")

   else:

       # else it print "not worthwhile"

       print("not worthwhile")

# string_contains function is called

string_contains("The animal is zebra")        

string_contains("learning is fun")

Explanation:

The code is written in Python and well commented.

Image of the output when the function is called is attached.

The organism is an amoeba belonging to the protist kingdom.

Explanation: The organism cannot be placed in the plantae kingdom because the organism does not contain a cell wall or chloroplasts. The organism also cannot be bacteria or Archaebacteria because it has a nucleus. The organism cannot belong to the fungi or animalia kingdom because it contains psedupodium.