Chapter 17, Problem 1TYU

Summary Introduction

Introduction: Many processes are involved in shaping the microorganism and its structures where it performs the correct functions and with great efficiency. An organism gains its form from an undifferentiated mass of cells to gain the function and characteristics that are specific to it. These processes are cell determination, cell differentiation, pattern formation, and morphogenesis.

Answer to Problem 1TYU

Correct answer: Morphogenesis occurs through the multistep process of pattern formation.

Hence, the correct answer is option (c).

Explanation of Solution

Reason for the correct answer:

Over many steps, an intricate pattern is created by the tissues to form organs, shapes, and structures of the organism and this is called pattern formation. It is driven by chemical signals. The process of morphogenesis proceeds by the process of pattern formation. Morphogenesis refers to the process of organizing the structures of the cell and forming it into shapes and structures that helps in the function of the cells. Hence, the pattern formation leads directly to morphogenesis.

Option (c) is given as “pattern formation”

Pattern formation is the multistep process through which morphogenesis occurs.

Hence, the correct answer is option (c).

Reasons for incorrect answer:

Option (a) is given as “differentiation”.

Acquisition of specific characteristics by the cell is known as cell differentiation. Cell differentiation is the final step through which cells become specialized, whereas morphogenesis refers to the spatial organization of cells.

Hence, option (a) is incorrect.

Option (b) is given as “determination”.

Determination of the genetic expression of the cell in order to perform a specific function is known as cell determination. Cell determination does not play any role in the spatial organization of cells.

Hence, option (b) is incorrect.

Option (d) is given as “totipotency”.

The property by which a cell divides and produces all the differentiated cells is known as totipotency. The differentiated cells spatially organize themselves through pattern formation and not totipotency.

Hence, option (d) is incorrect.

Option (e) is given as “selection”.

Selection is the process through which the nature selects the fittest organism which can survive. Selection is not a process through which cells get organized into recognizable structures.

Hence, option (e) is incorrect.

Hence, options (a), (b), (d), and (e) are incorrect.

Conclusion

Pattern formation is the multistep process which leads to morphogenesis.