Which of the following is not an Annelid?

Protochordates possess a notochord in larval forms. Appraise the use of this feature in these animals.

Well-defined nucleus is absent in

In the taxonomic hierarchy, the family comes between:

$(a)$ What is the significance of binomial nomenclature?
$(b)$ Who introduced the system of scientific naming?
$(c)$ Write any two conventions followed while writing the scientific names.

State whether the following statement is true or false:
Cryptogamae means those with open reproductive organs.