Q.What is meant by 'sexual dimorphism'? Name one phylum studied in this chapter in which it is commonly observed.

Step 1. Sexual dimorphism refers to a condition in which the male and the female of the same species show clearly distinguishable differences in external body form, beyond just the reproductive organs.

Step 2. In Aschelminthes (the roundworms), the sexes are separate (the phylum is dioecious), and sexual dimorphism is frequently observed — for example, males and females of Ascaris differ noticeably in overall body form. …

Define sexual dimorphism and recall the chapter's named example ph …

• Confusing sexual dimorphism (visible male/female body-form difference) with simple sexual reproduction (which does not by itself imply any visible difference). …