MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which among the following is called Portuguese man of war ? |
| A. | <em>Pennatula</em> |
| B. | <em>Physalia</em> |
| C. | <em>Adamsia</em> |
| D. | <em>Meandrina</em> |
| Answer» D. <em>Meandrina</em> | |
| 2. |
Which among the following statements is incorrect about Obelia? |
| A. | <em>Obelia</em> (polyp) produces medusa by fragmentation |
| B. | Medusae undergoes sexual reproduction to produce polyp |
| C. | <em>Obelia</em> exists in both the forms in alternate generations |
| D. | This process is called metagenesis |
| Answer» B. Medusae undergoes sexual reproduction to produce polyp | |
| 3. |
Which among the following statements is incorrect about ctenophores? |
| A. | Ctenophores are radially symmetrical |
| B. | They are diploblastic |
| C. | They reproduce both sexually and asexually |
| D. | They have ciliated comb plates on their body |
| Answer» D. They have ciliated comb plates on their body | |
| 4. |
The property of emitting light from a living organism is called as ________ |
| A. | Bioluminescence |
| B. | Phosphorescence |
| C. | Biophosphorescence |
| D. | Cytoluminescence |
| Answer» B. Phosphorescence | |
| 5. |
Which among the following statements are incorrect about coelenterates? |
| A. | Coelenterates are acoelomates |
| B. | Tentacles have stinging capsules called cnidocytes that help in catching of prey |
| C. | In most of the cases, medusa is sessile |
| D. | Corals have skeleton that is made up of CaCO<sub>3</sub> |
| Answer» D. Corals have skeleton that is made up of CaCO<sub>3</sub> | |
| 6. |
Coelenterates that are umbrella shaped are called as ______ |
| A. | Medusa |
| B. | Polyp |
| C. | Taenia |
| D. | Auerelia |
| Answer» B. Polyp | |
| 7. |
Which among the following is incorrect about Cnidarians? |
| A. | They are also called as coelenterates which means they are fully bellied |
| B. | The name Cnidaria is due to presence of stinging capsules called cnidoblasts on the surface of their tentacles |
| C. | Endodermal cells contain muscle and nerve cells that help in their mobility |
| D. | Hypostome helps in ingestion and egestion |
| Answer» D. Hypostome helps in ingestion and egestion | |
| 8. |
Which among the following is incorrect about Coelenterata? |
| A. | Tissue level of organization is present in Coelenterata |
| B. | Sea anemone exists in colonies |
| C. | They have two layers of cells in their body i.e. they are diploblastic |
| D. | They have a complete digestive system |
| Answer» E. | |
| 9. |
Some sponges are radially symmetrical |
| A. | True |
| B. | False |
| Answer» B. False | |
| 10. |
Which among the following is incorrect about Porifera? |
| A. | The name Porifera comes from the pores present on the surface of the sponges |
| B. | A hard and protective skeleton made up of spongin or spicules supports the body |
| C. | Development of embryo takes place through an intermediate larval stage |
| D. | The digestive system in Porifera is incomplete |
| Answer» E. | |
| 11. |
Transport or canal system in Porifera helps in exchange of gases, distribution of food, water removal, gathering of food and formation of new individual. |
| A. | True |
| B. | False |
| Answer» C. | |
| 12. |
The property of not having separate sexes in an organism is called as __________ |
| A. | Hermaphrodite |
| B. | Oogamous |
| C. | Homogamous |
| D. | Heterogamous |
| Answer» B. Oogamous | |
| 13. |
Choanocytes are also called as ________ |
| A. | Flagellated cells |
| B. | Collar cells |
| C. | Amoeboid cells |
| D. | Epidermal cells |
| Answer» C. Amoeboid cells | |
| 14. |
Which among the following is incorrect about transport canal system in Porifera? |
| A. | Water enters the cavity through minute pores called as ostia |
| B. | Flagellated cells create water currents inside spongocoel |
| C. | Collar cells help in the distribution and filtering of food materials |
| D. | Water leaves the spongocoel through Osculum |
| Answer» D. Water leaves the spongocoel through Osculum | |
| 15. |
Opening on the upper side of spongocoel _________ |
| A. | Osculum |
| B. | Cnidoblasts |
| C. | Spicules |
| D. | Ostia |
| Answer» B. Cnidoblasts | |