MCQOPTIONS

Explore topic-wise MCQs in Biology.

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