Methodology of pteridophytes

Plants from this group have well-developed roots, stem and leaves and separate tissues for conduction of food and water .But ,they do not bear flowers and fruits.They reproduce with the help of spores formed along the bach or posterior surface of their leaves.Examples : Nephrolepis,Marsilea,Adiantum, Equisetum, Lycopodium, Selaginella,etc.

These plans reproduce asexually by spore-formation and sexuall by zygote formation.They have a well-developed conducting system.

Explanation:

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2%? i tried finding the exact sorry if it's not 100% correct ; -;

straight probes are used primarily for measuring flow as it is approaching the test area. its geometry allows the probe to be mounted so that it is in the direct line of airflow.