Which of the following would rank lowest in cephalization? a. arthropods b. mammals c. mollusks d. cnidarians

The correct answer is- D) Cnidarians.

Cephalisation is a process that describes the development of a distinct head that possesses a well developed brain, which controls the whole body of the organism. Vertebrates like mammals are the most cephalised organisms as they contain highly developed head with nervous system.    

Among invertebrates, some cephalised organisms include insects, spiders, mites ( that come under arthropoda).

Cnidarians like sea anemone, jelly fish are lowest in cephalisation because they only contain a basic nervous system but they are devoid of head.                

answer: angiosperms

dicots

angiosperms are highly evolved plants, they produce seeds which are enclosed within in a carple. these are the largest group of plants on earth. they include trees, shrubs, herbs and small flowering plants. angiosperms exhibit a flowering stage in their life cycle. the flower serves the function of reproduction and fruit formation in majority of angiosperms. dicot is the term used to describe flowering plants that have two seed leaves. dicots are plants which develop seeds which split into two parts called cotyledons. each cotyledon contains one embryo.

here, a small purple flower development indicates that the plant belongs to angiosperms and having two embryonic leaves indicates it belongs to dicots.