AP BIOLOGY

Detailed explanation-1: -Multicellular organisms are organisms that are made up of more than one type of cell and have specialized cells that are grouped together to carry out specialized functions.

Detailed explanation-2: -Specialized cells such as guard cells are found only in plants. Bone, connective, and nerve tissues are found only in animals.

Detailed explanation-3: -Cells function differently in unicellular and multicellular organisms. A unicellular organism depends upon just one cell for all of its functions while a multicellular organism has cells specialized to perform different functions that collectively support the organism.

Detailed explanation-4: -Multicellular organisms need cells to carry out different functions and work together to support a balance in the system called homeostasis. Thus, different cells become specialized for various functions.

Detailed explanation-5: -Specialized cells are the essence of complex multicellular life. Fossils allow us to study the modification of specialized, multicellular features such as jaws, scales, and muscular appendages.