wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

Alternation of generations is seen in

A
Adamsia
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
Aurelia
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
Hydra
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
Obelia
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
Open in App
Solution

The correct option is D Obelia
Metagenesis is basically the alternation of generations between sexual and asexual reproduction. In other words, a generation developed by sexual means is followed by one or more that reproduce asexually. Many cnidarians exhibit this. Based on this, cnidarians exhibit two basic body forms - the asexual polyp and sexual medusa. Many cnidarians are restricted to one of these types throughout their life. For example, sessile cnidarians such as Hydra and Adamsia are found in the polyp form, while free-swimming ones like the jellyfish (Aurelia) are found in the medusa form throughout their lives. Others, such as Obelia, exhibit both the forms during their life cycle, and thus, such cnidarians exhibit metagenesis, as they keep alternating between the polyp and medusa stages.

flag
Suggest Corrections
thumbs-up
3
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Harshvardhana's Reign
HISTORY
Watch in App
Join BYJU'S Learning Program
CrossIcon