- 1(current)
Q. No.A sort of alternation and generation seen in Cnidarians is termed as:
1. Metamorphosis
2. Epiboly
3. Metagenesis
4. Anagenesis
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
Biradial symmetry and lack of cnidoblasts are the characteristics of
1. Hydra and starfish
2. Starfish and sea anemone
3. Ctenoplana and Beroe
4. Aurelia and Paramoecium
Select the Taxon mentioned that represents both marine and fresh water species–
1. Echionoderms
2. Ctenophroa
3. Cephalocoradata
4.Cnidaria
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
Metagenesis refers to–
1. Alternation of generation between asexual and sexual phases of an organism
2. Occurrence of a drastic change in form during post-embryonic development
3. Presence of a segmented body and parthenogenetic mode of reproduction
4. Presence of different morphic forms
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
What is not true regarding Cnidarians?
1. Body is mode of distinct tissues but true organs have not evolved
2. They are carnivores
3. They may have two body forms – polyps and medusa
4. The digestion is completely intra-cellular
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
Which of the following is not a feature of Cnidaria?
1. Radially symmetrical animals
2. Gastro-vascular cavity with a single opening
3. Presence of cells that contain stinging capsules
4. Some have asexually reproducing medusa
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
Match the following list of animals with their level of organization.
| Division of Labour | Animal | ||
| A. | Organ level | i. | Pheritima |
| B. | Cellular aggregate level | ii. | Fasciola |
| C. | Tissue level | iii. | Spongilla |
| D. | Organ system level | iv. | Obelia |
Choose the correct match showing division of labour with animal example:
| i | ii | iii | iv | |
| 1. | B | C | D | A |
| 2. | B | D | C | A |
| 3. | D | A | B | C |
| 4. | A | D | C | B |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
Identify the incorrect statement regarding cnidocytes:
1. Their presence defines Cnidarians
2. They are used to capture prey and as a defense against predators.
3. The release of potassium ions plays primary role in the function.
4. The mechanism of their action is dependent on osmotic pressure.
Most corals obtain the majority of their energy and nutrients from photosynthetic zooxanthellae that are:
1. Dinoflagellates
2. Diatoms
3. Cyanobacteria
4. Chlamydomonas
The body structure of a porifer shown in the given diagram is:
1. Asconoid
2. Syconoid
3. Leuconoid
4. Mucoid
- 1(current)
Q. No.
© 2026 GoodEd Technologies Pvt. Ltd.