Morphology And Functional Morphology Of Invertebrates

- Assertion (A) is correct: Adult gastropods, such as snails, undergo a developmental process called torsion, which leads to asymmetry in the adult form. This is a characteristic feature of this class in phylum Mollusca.
- Reason (R) is incorrect: While it's true that some aspects of body structure are established early in development, symmetry itself is initially bilateral in molluscs, and the asymmetry in gastropods is due to a specific later-stage developmental process (torsion), not simply general developmental timing. Hence, A is true but R is not.

A bisexual flower has both stamens (male) and carpels (female). This allows self-fertilization. Unisexual flowers have only one reproductive part. Asexual and conjugation do not describe flower types.