In Ctenophores, asexual reproduction is absent. They are monoccious and fertilization is external. In cnidaria, asexual reproduction by budding is seen in polyp forms, and sexual reproduction in medusae forms. In protozoan, asexual reproduction occurs by fission, budding, etc. and sexual reproduction by conjugation and syngamy. In porifera ascxual reproduction occurs by gemmule formation. Related Theory Ctenophores are free-swimming. marine, solitary, pelagic animals with no polymorphism and no attached stages were found. They have a pair of long, solid, retractile tentacles and lack nematocysts. They have special adhesive and sensory cell i.e., colloblasts or lasso cells present in tentacles which helps in food capture. They are monoecious (hermaphrodite); gonads are endodermal situated on walls of digestive canals and development is direct with characteristic cydippid larva and lack asexual reproduction and alternation of generation. Regeneration and paedogenesis are common in them. Eg. Pleurobrachia, Hormiphora, Ctenoplana, Coeloplana.
Which one of the following groups of animals reproduces only by sexual means?
NEET UG 2013 — Botany Animal Kingdom
Which one of the following groups of animals reproduces only by sexual means?
Held on 30 Apr 2013 · Verified 9 Jul 2026.
Options
- A
Cnidaria
- B
Porifera
- C
Protozoa
- D
Ctenophora
Did you get this right?
Sign in to track your attempts and accuracy.
Your note
Sign in to keep a private note on this question. Nothing you write is ever public.
NEET UG Animal Kingdom in other years
More NEET UG Animal Kingdom questions
Role of the water vascular system in Echinoderms is : A. Respiration and Locomotion B. Excretion and Locomotion C. Capture and transport of food D. Digestion and Respiration E. Digestion and Excretion Choose the correct answer from the options given below :
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : All vertebrates are chordates but all chordates are not vertebrate. Reason (R) : The members of subphylum vertebrata possess notochord during the embryonic period, the notochord is replaced by cartilaginous or bony vertebral column in adults. In the light of the above statements, choose the correct answer from the options given below:
All living members of the class Cyclostomata are :
While trying to find out the characteristic of a newly found animal, a researcher did the histology of adult animal and observed a cavity with presence of mesodermal tissue towards the body wall but no mesodermal tissue was observed towards the alimentary canal. What could be the possible coelome of that animal?
Match List-I with List-II. \begin{array}{|l|l|l|l|}\hline & List-I & & List-II \\\hline A. & Chondrichthyes & I. & Clarias \\\hline B. & Cyclostomata & II. & Carcharodon \\\hline C. & Osteichthyes & III. & Myxine \\\hline D. & Amphibia & IV. & Ichthyophis \\\hline\end{array} Choose the correct answer from the options given below:
Other Botany topics for NEET UG
Keep practicing Animal Kingdom
Work through every NEET UG Animal Kingdom PYQ, year by year.