Home
Class 11
BIOLOGY
Key' is a taxonomical aid used for the i...

Key' is a taxonomical aid used for the identification of organisms. Each statement in key is called a _________.

A

couplet

B

lead

C

both (a) and (b)

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
B
Key is a taxononmical aid used for identification of plants and animals based on the similarities and dissimilarities. The keys are based on contrasting characters generally in a pair called coulpet. It represents the choice made between two opposite. options, which results in acceptance of only one and rejection of the other. Each statement in the key is called a lead.
Promotional Banner

Similar Questions

Explore conceptually related problems

Taxonomic key is one of the taxonomic tools in the identification and classification of plants and animals. It is used in the preparation of

How is a key helpful in identification and classification of organisms?

Living organisms used to enrich the nutrient quality of the soil are called as

Read the following statements with one or two blanks in each one of them. (i) A genus containing more than one species is called ______ genus, e.g., _______ . (ii) _______ is a collection of dried, pressed and preserved plants mounted on _________ sheets, properly labelled, systematically arranged and available for reference study. (iii) Living fossils are ancient organisms persisting in modern times _______ gradual morphological changes. (iv) A ________ is compreshensive treatise of a taxonomic group, generally a genus or a family, providing all taxonomic data related to that group. Which of the following correctly fills any two of the above statements ?

Read the following statements. P : The taxonomic hierarchy for Brassica campectris can be written as Plante rarr Phanerogamae rarr Angiospermae rarr Dicotyledonae rarr Parietals rarr Brassicaces rarr Brassica rarr campestris. Q : Tautonym is the taxonomic designation used for certain plants having trinomial nomenclature. R : A chaaracter present in an ancestral species and shared exclusively by its evolutionary descendants is referred to as synapomorphy. S : Family Fabaceae is divided into three sub-families, i.e., Leguminosa, Mimosaceae and Caesalpiniaceae. Whcih of the following combinations of above statements is correct ?

Correct the statements of each bit, if necessary, by changing the underlined words only The number of deaths taking place in a particular population in unit time is called underset"_________""natality"

Choose the correct answer from the choices given under each bit/Correct the underlined portion of the sentences. The use of organisms in clearing oil spills from water bodies is called bioaccumulation.

A drug used for patient A is obtained from the organism B. Identify A and B in the above statement and select the correct answer.

When two organisms live together helping each other ,the association is called :