Pteridophyta do not have

The branch of biology which deals with the principles and practice of classification of plants and animals is

Write true or false for the following statement:
Plants with well-differentiated reproductive tissues that ultimately make seeds are called pteridophytes.

List two similarities and two differences between the features of nematodes and annelids.

Identify the plant bodies,which are commonly named as 'cryptogamae'. State and explain two characteristics,which are exhibited by each category of these plant bodies.

State any three bases for the classification of organisms into five kingdoms.