Question

Below is a list of functions performed by organisms. Examine the list, then answer the question that follows.
gas exchange
intake of nutrients
disposal of wastes
stimulus response
reproduction
How do these functions compare between single-celled and multi-celled organisms?
A.
Single-celled organisms must perform all of these functions with one cell, while multi-celled organisms can have specialized cells for different functions.
B.
Neither single-celled organisms nor multi-celled organisms can perform all of these necessary functions.
C.
Single-celled organisms can perform all of these functions, while multi-celled organisms can perform only some of these functions.
D.
Single-celled organisms can perform only some of these functions, while multi-celled organisms can perform all of these functions.

Answer 1

A.

Both single-celled and multicellular organisms must carry out those functions, but single-celled organisms do them all within one cell, whereas multicellular organisms have specialized cells/tissues/organs to perform different functions (e.g., gills/lungs for gas exchange, digestive system for nutrient intake, excretory system for waste disposal, nervous system for stimulus response).