Tag: plant taxonomy

Phanerogamae are the sub-kingdom of kingdom Plantae. They include seed bearing and flowering plants. They are further grouped into angiosperms and gymnosperms 

Phylogenetic classification mainly depends on similarities and differences in their physical or genetic characteristics. The evolutionary relationship defined by the phylogenetic depends on the body symmetry, the pattern of embryonic development, the complexity of tissue organisation. Motility is a basic characteristic which is not prominent for a particular class rather it is common to all. It do not change with evolution.

• Michael Adanson was the first scientist to reject all the artificial systems and support the natural systems of classification.
  
• Natural system of classification is that in which all natural characteristics of plants both vegetative and reproductive characters are taken into consideration. It is purely natural as the knowledge of phyllogenicity was not detected 
• Natural system of classification is a biological classification based upon morphological and anatomical relationships and affinities 

Taxonomy is the study of science concerned with classification according to their natural relationships. Carl Linnaeus is regarded as the father of taxonomy as he developed a system for categorization of organisms and binomial nomenclature for naming organisms. But Taxonomy's first father was the philosopher Aristotle, he first introduced the two key concepts of taxonomy: classification of organisms by type and binomial definition. Therefore founder of taxonomy is Aristotle. Hence option A is correct.

Taxonomy is a branch of biological science involved with classifying organisms based on characteristics they share in common. Using morphological, behavioural, genetic and biochemical observations, taxonomists identify, describe and arrange species into a hierarchical system of groups.

Peritrichous flagellation means containing flagella projecting in all directions.

Gingko is a living fossil. Newly found specimens that grew more than a hundred million years ago. It is remarkably similar to present-day plants.

Selaginella possesses a rhizophore which is a prop like structure that originates at a point of branching.

The flower of Wolffia is famous as the smallest flower in the world. It has one stamen and one pistil.

Macrocystis, kelp is the largest of all algae. The stage of the life cycle commonly can be seen, is the sporophyte, which is perennial and individuals persist for many years.

Therefore the correct option is A

Hence option A is correct.

• Taxonomy can be analyzed on a measuring scale based on OTU (Operational taxonomic unit), Carbon dating and Karyotyping.
  
• An operational taxonomic unit (OTU) is an operational definition used to classify groups of closely related individuals.
  
• Carbon dating is used to determine age of age old fossils.
• Karyotyping is arranging and pairing of different chromosomes of an organism. They can be compared to study inter-relationship and evolutionary connection between organisms in a taxon. 

A plant which lives for a few days is called ephemral because of a very short growing season.  Such plant are found near desert or in very cold  countries e.g., Arabidopsis species  have life span of  20-28 days . 

• The International code of botanical nomenclature (ICBN) is the organization that is responsible for rules and recommendations which are proposed whenever organisms are named. 
• There were different codes that were put forward in the years of 1800 and 1900s. 
• The final revised code for ICBN was revised and accepted in the year 1978.