MCQOPTIONS
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MCQOPTIONS
This section includes 12 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 statements is incorrect about Hemichordates? |
| A. | Embryo development is indirect i.e. they have an intermediate larval stage |
| B. | The circulatory system is of closed type i.e. they have a dorsal heart and blood vessels |
| C. | They have dorsal and ventral nerves that help in coordination |
| D. | They are monoecious |
| Answer» E. | |
| 2. |
Which among the following is incorrect about Hemichordates? |
| A. | Their digestive system is complete with both mouth and anus |
| B. | They are bilaterally symmetrical and are coelomates |
| C. | They adopt tracheal mode of respiration |
| D. | These organisms are also called as acorn worms |
| Answer» D. These organisms are also called as acorn worms | |
| 3. |
Which among the following is incorrect about Hemichordata? |
| A. | They have three main parts in their body, namely, Proboscis, Collar and a long trunk |
| B. | Open circulatory system is present in these organisms |
| C. | Excretion takes place through proboscis gland |
| D. | Hemichordates are organisms that contain notochord like chordates but lack in all other features |
| Answer» E. | |
| 4. |
Which among the following is incorrect about nervous system in Echinodermata? |
| A. | Radial nerves extend through the arms from the central nerve ring that surrounds the mouth |
| B. | Sensory tentacles help in sense of touch |
| C. | Epidermis contains sensory cells that help in sense of touch |
| D. | Their brain is made up of 4 nerve rings |
| Answer» E. | |
| 5. |
Which among the following is incorrect about Echinoderms? |
| A. | Larval stage is bilaterally symmetrical and adults are radially symmetrical |
| B. | They are dioecious and most of the times the fertilization is external |
| C. | The larvae is immobile and bilaterally symmetrical |
| D. | They have a complete digestive system with mouth on the ventral side and anus on the dorsal side |
| Answer» D. They have a complete digestive system with mouth on the ventral side and anus on the dorsal side | |
| 6. |
Which among the following is incorrect about water vascular system in Echinoderms? |
| A. | Water driven tube feet system helps in locomotion as well as in excretion |
| B. | Water vascular system has a ring canal which fills initially followed by that of radial canals |
| C. | Echinoderms excrete waste by osmosis in the tube feet |
| D. | Exchange of gases takes place due to water vascular system |
| Answer» D. Exchange of gases takes place due to water vascular system | |
| 7. |
Which among the following is incorrect about Echinodermata? |
| A. | The word Echino means spiny and dermata means skinned |
| B. | Echinoderms are dioecious with fertilization being external in most cases |
| C. | They have a central nerve ring that extends throughout their body |
| D. | The circulatory system is closed and they have a heart along with blood vessels |
| Answer» E. | |
| 8. |
Mollusks have a file like rasping organ called as radula that helps them in catching prey |
| A. | True |
| B. | False |
| Answer» B. False | |
| 9. |
Which among the following is not correct about organ systems in mollusks? |
| A. | Pair of main nerve cords extends throughout their body |
| B. | Mollusks respire either through gills or mantle cavity |
| C. | Excretion occurs through malpighian tubules |
| D. | They have an open type of circulatory system |
| Answer» D. They have an open type of circulatory system | |
| 10. |
The soft spongy layer of skin over the hump is called as ________ |
| A. | Visceral Hump |
| B. | Mantle |
| C. | Radula |
| D. | Foot |
| Answer» C. Radula | |
| 11. |
Which among the following statements is incorrect about nervous system in Mollusca? |
| A. | Ganglia are present at important parts of body |
| B. | All the mollusks exhibit cephalization |
| C. | Many of them have eyespots that act as photoreceptors |
| D. | The anterior head region has sensory tentacles that help in sense of touch |
| Answer» C. Many of them have eyespots that act as photoreceptors | |
| 12. |
Which among the following is incorrect about Mollusca? |
| A. | This is the second largest phylum of Animal Kingdom |
| B. | They have organ system level of organization |
| C. | They have a dorsal heart along with dorsal and ventral blood vessels |
| D. | Their body is covered with calcareous shell |
| Answer» D. Their body is covered with calcareous shell | |