Question

Complete the following paragraphs describing how the original two kingdom system of classification was expanded to six kingdoms. The first classification scheme created to group organisms had only two kingdoms, Kingdom _______ and Kingdom Animalia. However, it soon became apparent that some of the ''simpler'' organisms were not easily classified into either group (e.g., slime molds). Consequently, in the 1860s a third kingdom was proposed, Kingdom . This kingdom included all organisms that did not develop . In 1938, it was proposed that a fourth kingdom, Kingdom . be created to include all prokaryotic, single-celled organisms that were formerly placed in Kingdom Protoctista. In 1969 the four kingdom classification system was replaced with a five-kingdom system proposed by . Recognizing the heterogeneity existing In Kingdom Protoctista, he separated the group into two new kingdoms. Kingdom Protista and Kingdom . Our current six kingdom classification system arose during the 1980s when _______ proposed that bacteria be divided into two kingdoms, Kingdom Bacteria and Kingdom . Plantae Eukarya complex tissue R. H. Whittaker euglenoids Monera Fungi Archaea Protoctista Carl Woese

Answer 1

The two-kingdom system of classification expanded to six kingdoms with the addition of Kingdom Protista, Monera, Fungi, Bacteria, and Archaea over time, reflecting advancements in our understanding of organism complexity and genetic relationships.

Step-by-step explanation:

The first classification scheme created to group organisms had only two kingdoms, Kingdom Plantae and Kingdom Animalia. However, it soon became apparent that some of the 'simpler' organisms were not easily classified into either group (e.g., slime molds). Consequently, in the 1860s a third kingdom was proposed, Kingdom Protista. This kingdom included all organisms that did not develop complex tissue. In 1938, it was proposed that a fourth kingdom, Kingdom Monera, be created to include all prokaryotic, single-celled organisms that were formerly placed in Kingdom Protista. In 1969 the four-kingdom classification system was replaced with a five-kingdom system proposed by R. H. Whittaker. Recognizing the heterogeneity existing in Kingdom Protista, he separated the group into two new kingdoms. Kingdom Protista and Kingdom Fungi. Our current six kingdom classification system arose during the 1980s when Carl Woese proposed that bacteria be divided into two kingdoms, Kingdom Bacteria and Kingdom Archaea.

Answer 2

The initial two-kingdom classification was expanded to six kingdoms due to the recognition of the diversity of organisms. Kingdom Plantae and Kingdom Animalia were followed by Kingdom Protista, then Kingdom Monera, leading to Whittaker's five-kingdom system, and eventually Woese's division of bacteria into Kingdom Bacteria and Kingdom Archaea.

Step-by-step explanation:

The first classification scheme created to group organisms had only two kingdoms: Kingdom Plantae and Kingdom Animalia. However, it soon became apparent that some 'simpler' organisms, like slime molds, were not easily classified into either group. Consequently, in the 1860s, a third kingdom was proposed, Kingdom Protista. This kingdom included all organisms that did not develop complex tissue. In 1938, it was proposed that a fourth kingdom be created, Kingdom Monera, to include all prokaryotic, single-celled organisms that were formerly placed in Kingdom Protista.

In 1969, the four-kingdom classification system was replaced with a five-kingdom system proposed by R. H. Whittaker. Recognizing the heterogeneity existing in Kingdom Protista, he separated the group into two new kingdoms: Kingdom Protista and Kingdom Fungi. Our current six-kingdom classification system arose during the 1980s when Carl Woese proposed that bacteria be divided into two kingdoms: Kingdom Bacteria and Kingdom Archaea.