The criteria (norms) for deciding divisions in plants are different from the criteria for deciding the sub- groups among animals because the basic designs of their body is different. This is mainly due to the fact that plants are autotrophic and often remain fixed to substratum, while animals are heRead more
The criteria (norms) for deciding divisions in plants are different from the criteria for deciding the sub- groups among animals because the basic designs of their body is different. This is mainly due to the fact that plants are autotrophic and often remain fixed to substratum, while animals are heterotrophic and they can move. Thus, the body design of the two groups is based on the need to make their own food in case of plants and to acquire it from external source in case of animals. The other characteristics such as Presence or absence of skeleton, etc., are used to make subgroups among animals.
Whittaker (1959) has based his scheme of classification of living organisms into five kingdoms (namely Monera, Protista, Fungi, Plantae and Animalia) on following four bases: 1. Complexity of cell structure. There are two broad categories of cell structure: Prokaryotic and Eukaryotic. Thus, two broaRead more
Whittaker (1959) has based his scheme of classification of living organisms into five kingdoms (namely Monera, Protista, Fungi, Plantae and Animalia) on following four bases:
1. Complexity of cell structure. There are two broad categories of cell structure: Prokaryotic and Eukaryotic. Thus, two broad groups can be formed – one having prokaryotic cell structure and the other having eukaryotic cell structure. Presence or absence of cell wall is another important characteristic.
2. Unicellular and multicellular organisms. This characteristic makes a very basic distinction in the body designs of organisms and helps in their broad categorizations.
3. Mode of nutrition. Organisms basically have two types of nutritions – autotrophic (they can manufacture their own food) and heterotrophic (they obtain their food from external environment, i.e., from other organisms). Thus, organisms can be broadly classified into different groups on the basis of their mode of
nutrition.
4. Phylogenetic relationship. Phylogeny is the evolutionary history or ancestry of an organism. It is believed that the simple organisms are primitive and complex organisms are advanced. This, primitive and advance nature of organisms also helps in their classification into broad groups. For example, the Monera are believed to have given rise to Protista, from which the remaining three kingdoms of multicellular organisms have evolved.
The Classification of have the followings advantages: 1. Classification of organisms according to a definite plan facilitates their identification and makes their study convenient. 2. There is a vast number of organisms in this world. It is not possible by the individual human being to know about alRead more
The Classification of have the followings advantages:
1. Classification of organisms according to a definite plan facilitates their identification and makes their study convenient.
2. There is a vast number of organisms in this world. It is not possible by the individual human being to know about all individuals. Thus, the study of a few representatives from each group gives a broad idea of the life as a whole.
3. Classification gives information about the organisms which do not occur in one’s locality.
4. Classification reveals evolution trends by showing gradually increasing complexity of structure in various groups of organisms.
How are the criteria for deciding divisions in plants different from the criteria for deciding the subgroups among animals?
The criteria (norms) for deciding divisions in plants are different from the criteria for deciding the sub- groups among animals because the basic designs of their body is different. This is mainly due to the fact that plants are autotrophic and often remain fixed to substratum, while animals are heRead more
The criteria (norms) for deciding divisions in plants are different from the criteria for deciding the sub- groups among animals because the basic designs of their body is different. This is mainly due to the fact that plants are autotrophic and often remain fixed to substratum, while animals are heterotrophic and they can move. Thus, the body design of the two groups is based on the need to make their own food in case of plants and to acquire it from external source in case of animals. The other characteristics such as Presence or absence of skeleton, etc., are used to make subgroups among animals.
See lessExplain the basis for groupings into five kingdoms.
Whittaker (1959) has based his scheme of classification of living organisms into five kingdoms (namely Monera, Protista, Fungi, Plantae and Animalia) on following four bases: 1. Complexity of cell structure. There are two broad categories of cell structure: Prokaryotic and Eukaryotic. Thus, two broaRead more
Whittaker (1959) has based his scheme of classification of living organisms into five kingdoms (namely Monera, Protista, Fungi, Plantae and Animalia) on following four bases:
See less1. Complexity of cell structure. There are two broad categories of cell structure: Prokaryotic and Eukaryotic. Thus, two broad groups can be formed – one having prokaryotic cell structure and the other having eukaryotic cell structure. Presence or absence of cell wall is another important characteristic.
2. Unicellular and multicellular organisms. This characteristic makes a very basic distinction in the body designs of organisms and helps in their broad categorizations.
3. Mode of nutrition. Organisms basically have two types of nutritions – autotrophic (they can manufacture their own food) and heterotrophic (they obtain their food from external environment, i.e., from other organisms). Thus, organisms can be broadly classified into different groups on the basis of their mode of
nutrition.
4. Phylogenetic relationship. Phylogeny is the evolutionary history or ancestry of an organism. It is believed that the simple organisms are primitive and complex organisms are advanced. This, primitive and advance nature of organisms also helps in their classification into broad groups. For example, the Monera are believed to have given rise to Protista, from which the remaining three kingdoms of multicellular organisms have evolved.
What are the advantages of classifying organisms?
The Classification of have the followings advantages: 1. Classification of organisms according to a definite plan facilitates their identification and makes their study convenient. 2. There is a vast number of organisms in this world. It is not possible by the individual human being to know about alRead more
The Classification of have the followings advantages:
See less1. Classification of organisms according to a definite plan facilitates their identification and makes their study convenient.
2. There is a vast number of organisms in this world. It is not possible by the individual human being to know about all individuals. Thus, the study of a few representatives from each group gives a broad idea of the life as a whole.
3. Classification gives information about the organisms which do not occur in one’s locality.
4. Classification reveals evolution trends by showing gradually increasing complexity of structure in various groups of organisms.