In biological terms, species is the basic taxonomical rank. It can be defined as a group of similar organisms that are capable of interbreeding under natural conditions to produce fertile offsprings. Therefore, a group of similar individuals that are respectively isolated form a species.
Species can also be defined as group of individuals that share the same gene pool.
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. |
Find the mean and variance for the following frequency distribution.
Classes | 0-10 | 10-20 | 20-30 | 30-40 | 40-50 |
Frequencies | 5 | 8 | 15 | 16 | 6 |