The knowledge of characteristics of an individual or its entire population helps in the identification of similarities and dissimilarities among the individuals of same kind or between different types of organisms. It helps the scientists to classify organisms in various categories.
Column I | Column II | ||
a. | Herbarium | i. | It is a place having a collection of preserved plants and animals. |
b. | Key | ii. | A list that enumerates methodically all the species found in an area with brief description aiding identification. |
c. | Museum | iii. | Is a place where dried and pressed plant specimens mounted on sheets are kept. |
d. | Catalogue | iv. | A booklet containing a list of characters and their alternates which are helpful in identification of various taxa. |
Figures 9.20(a) and (b) refer to the steady flow of a (non-viscous) liquid. Which of the two figures is incorrect ? Why ?