Archaebacteria are able to survive in harsh conditions due to the presence of branched lipid chain in cell membrane that reduces fluidity of cell membrane. It includes halophiles which are exclusively found in saline habitats.

Correct Option: D

Archaebacteria are able to survive in harsh conditions due to the presence of branched lipid chain in cell membrane that reduces fluidity of cell membrane. It includes halophiles which are exclusively found in saline habitats.

George Bentham and Joseph Dalton Hooker have given Natural system of classification. In this system of classification all the important characteristic of the organisms that provide information regarding their natural relationship are taken into consideration which helps in bringing out maximum number of similarities in a group and comparable differences with other groups of organisms. For example, mammals are characterised by the presence of mammary gland, hair, vivipary, 4 chambered heart etc.

Correct Option: B

George Bentham and Joseph Dalton Hooker have given Natural system of classification. In this system of classification all the important characteristic of the organisms that provide information regarding their natural relationship are taken into consideration which helps in bringing out maximum number of similarities in a group and comparable differences with other groups of organisms. For example, mammals are characterised by the presence of mammary gland, hair, vivipary, 4 chambered heart etc.

Linnaeus put forward an “Artificial system” of plant classification which was based on sexual characters. It is commonly also called as Sexual System of plant classification.

Correct Option: B

Linnaeus put forward an “Artificial system” of plant classification which was based on sexual characters. It is commonly also called as Sexual System of plant classification.

During the early period in taxonomy, only external morphology (the characters observable with naked eye) were the sole criteria to classify plants and animals. Theophrastus gave names and description of 480 plants in his book “Historia plantarum” , on the basis of their habit but Pliny the Edler introduced first artificial system of classification in his book Historia Naturalis. He classified both plants and animals.

Correct Option: C

During the early period in taxonomy, only external morphology (the characters observable with naked eye) were the sole criteria to classify plants and animals. Theophrastus gave names and description of 480 plants in his book “Historia plantarum” , on the basis of their habit but Pliny the Edler introduced first artificial system of classification in his book Historia Naturalis. He classified both plants and animals.

The first phylogenetic system of classification was proposed by Adolf Engler and his associate Karl Prantl in their monograph “Die Naturlichen Pflanzen Familien”. In this system of classification, organisms are classified on the basis of evolutionary sequence and genetic relationship among the organisms. Hence, this system is highly dynamic not static. Fossil records play a vital role in elucidation of evolutionary relationships. This system has led to new systematics.

Correct Option: D

The first phylogenetic system of classification was proposed by Adolf Engler and his associate Karl Prantl in their monograph “Die Naturlichen Pflanzen Familien”. In this system of classification, organisms are classified on the basis of evolutionary sequence and genetic relationship among the organisms. Hence, this system is highly dynamic not static. Fossil records play a vital role in elucidation of evolutionary relationships. This system has led to new systematics.