Accessibility options


class (biology)

Class (biology)

In biological classification, a subdivision of phylum and forms a group of related orders. For example, all mammals belong to the class Mammalia and all birds to the class Aves. Among plants, all class names end in ‘idae’ (such as Asteridae) and among fungi in ‘mycetes’; there are no equivalent conventions among animals. Related classes are grouped together in a phylum.

© RM 2009. Helicon Publishing is division of RM.


 
 

Encyclopaedia Search

Click a letter for the index
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Or search the encyclopaedia:
 
 
All results tagged with the symbol denotes content that is relevant to the national curriculum

Advertisement starts



Advertisement ends


Advertisement starts



Advertisement ends

Country Search

 
 

Dictionary search

 
 

Sierra Leone Flag

Sierra Leone Flag
Green stands for the country's natural resources. White represents peace, justice, and unity. Blue recalls the sea and the capital Freetown's natural harbour. Effective date: 27 April 1961.

Health Search

 
 
Search all Diseases Medicines

Advertisement starts



Advertisement ends

Skip to page content | Text onlyGraphical version of this page

Tiscali Quicklinks. Please visit our Accessibility Page for a list of the Access Keys you can use to find your way around the site, skip directly to the main navigation, to the page content, or to more links within reference.

web |  shopping |  this site |  video |  local services

Page Footer


Access keys


You will need to use different key combinations in order to use access keys depending on your internet browser, find out which on our accessibility page.
  • (0) Navigate to Accessibility page.
  • (1) Navigate to Home page.
  • (2) Navigate to My email.
  • (3) Navigate to My Account.
  • (4) Navigate to Site Map page.
  • (5) Navigate to Contact us page.
  • (6) Navigate to Members channel.
  • (7) Navigate to Services channel.
  • (8) Navigate to News & Info channel.
  • (9) Navigate to Entertainment channel.
  • ([) Skip down to the Primary navigation block.
  • (]) Skip down to the more links within this section block.
  • (=) Bypass all navigation and jump to the content.
  • (x) Text only version of this page.
Background images used:
furniture images used in the site icons used in the site images used in the header