Radial symmetry is usually exhibited in animals which:
Correct answer: A. Are attached to the substratum
- A. Are attached to the substratum
- B. Have one opening of alimentary canal
- C. Live in water
- D. Have ciliary mode of feeding
Explanation
The organisms attached to the substratum possess radial symmetry in all vertical planes. All the animals belonging to cnidaria (e.g. jellyfish) and echinodermata (e.g. starfish) are radially symmetrical and typically sessile in their adult form. In radial symmetry, the parts in an organ or organism, when cut through the centre in any direction, produce two halves that are mirror images of each other.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About Kingdom Animalia
Animals are multicellular, heterotrophic eukaryotes whose cells lack cell walls and chloroplasts, with specialised tissues in most groups. Coverage includes body symmetry, tissue layers, coelom, segmentation and levels of organisation, plus major phyla such as Porifera, Cnidaria, Platyhelminthes, Annelida, Arthropoda, Mollusca and Chordata.
Practise Biodiversity and Variety of Life
3,130 free Biodiversity and Variety of Life MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Biology questions like this
Biology is on 8 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Kingdom Animalia questions
The formation of a canal system in sponges is due to:
The most appropriate term to describe the life cycle of Obelia is:
Which of the following animals have scattered cells with cell tissue grade organisation?
What is true about Taenia saginata?
The bullfrog of India is:
Aristotle's lantern occurs in which class?