The "sides" of the DNA ladder are known as the?

Name the following: (a) category of pathogen that causes diseases, like common cold and mumps. (b) the microorganism that requires a host to produce.

Pls quickly! which of the following is true about the behavior of an organism? a. the behavior of an organism is influenced by both its heredity and it’s environment. b. the behavior of an organism is influenced only by the treats it inherits from its parents. c. the behavior of an organism is influenced only by the environment in which it lives in. d. the behavior of an organism is not influenced by either it’s heredity or its environment.

The smallest parts of these that retain their original properties are called