Little known information on Organography and secondary growth. Organography means the description of various organs of plants and animals. The external features of plant organs like stem, root, leaf, fruits, etc. Stem and root.
Tag Archives | secondary
What is the difference between Primary phloem and secondary phloem? 1. Derived from procambium of apical meristem. 1. Derived from vascular cambium.
Secondary groups may be defined as those associations which are characterized by impersonal or secondary relations. In every respect, they are opposite of primary groups.
Apart from the primary or essential functions, the family also performs some other functions. To these other functions MacIver termed as non-essential functions and some other sociologists as secondary functions.
Broadly speaking, there are two sources of statistical data-internal and external. Internal source refers to the information collected from within the organization. For example different organization and Government departments generate large volume of information.
Secondary data are second hand informations. They are not collected from the source as the primary data. In other words, secondary data are those which have already been collected.
Secondary group is a large group in which a large number of persons come into indirect contact with one another. Sometimes these groups are called, "Special Interest Groups"., City, nation, political party, trade union etc. are the bright examples of secondary groups.
Like primary group, secondary group is of special significance in modern society, and of which the large scale organisation is the most outstanding example. A secondary group is one which is large in size, such as, city, nation, political party, labour union etc.
The difference between Primary and Secondary Xylem are : Primary Xylem is primary in nature and is derived from procambium whereas secondary xylem is secondary in nature and is derived from fascicular and interfascicular cambium.
What is secondary growth and explain the successive stages of a normal secondary growth seen in Dicot stems ?
The secondary growth may be defined as an increase in thickness due to the formation of secondary tissues cut off by the cambium and cork cambium in the stellar and extrastelar regions.