Proteins have many functions and express your traits
The correct answer would be D) An observation that has a number associated with it.
Endosymbiosis is the process of one organism living in another, a form of parasite. Flies and other insects live inside of fungi, such as mushroom. Your answer is B. fungi. Have a wonderful day :D
During exponential growth the rate of growth accelerates according the the number in the exponent of the base, which can of course vary depending on circumstance.