The correct option is B.
A multi cellular organisms has many cells which carry out various function and which are organised into tissues, organs and organ system. A unicellular organism on the other hand has only one cell with different cell organelles. Thus, in unicellular organisms, it is the cell organelles that carry out different functions. <span />
The correct way to describe science is that is referred as a way of knowing.
The reason for this definition is that, it is responsibility of ancient to help humans to gain knowledge and understands in response to what they want to search so as to know more about something.
It organizes and builds knowledge for predictions and explanation on the universe.
Science can be divided into natural science, social science which include economics, and formal science which include mathematics.
A genus is composed of a number of related species. For example, canus is the genus for dogs.
