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 is incorrect about types of digestive system in animals?
A.	A digestive system with one opening to outside is called incomplete digestive system
B.	A digestive system with separate openings for ingestion and egestion is called complete digestive system
C.	Platyhelmenthes have a complete digestive system
D.	Sea sponges have an incomplete digestive system
Answer» D. Sea sponges have an incomplete digestive system

2.	Mesoderm gives rise to ______
A.	Muscular tissues
B.	CNS
C.	Urinary bladder
D.	Skin
Answer» B. CNS

3.	Which among the following is incorrect about arrangement of cells in embryo?
A.	The word blasted derives its origin from the word blastula which means a hollow ball of cells formed during the early stage of embryo
B.	If the number of cell layers in blastula is two in number, i.e. ectoderm and endoderm, then such organisms are considered to diploblastic
C.	If the number of cell layers in blastula is three in number, i.e. ectoderm, mesoderm and endoderm, then such organisms are considered to triploblastic
D.	In diploblastic organisms, mesoglea, a well differentiated substance, is present between endoderm and ectoderm
Answer» E.

4.	Sponges are ______
A.	Asymmetrical
B.	Radially Symmetrical
C.	Bilaterally symmetrical
D.	Bimedially symmetrical
Answer» C. Bilaterally symmetrical

5.	Which among the following is incorrect about circulatory system in different animals?
A.	In open circulatory system, blood is pumped by heart into blood cavity
B.	In closed circulatory system, blood is enclosed in blood vessels
C.	Interstitial fluid is separated from blood in the case of closed circulatory system
D.	Closed circulatory system is exhibited by arthropods
Answer» E.

6.	In a closed circulatory system, interstitial fluids and blood has no specific distinction and therefore called as hemolymph.
A.	True
B.	False
Answer» C.

7.	Which among the following is incorrect about organ system level of organization?
A.	Organs group to form organ systems
B.	Each and every organ system are specialized to perform a specific physiological activity
C.	Annelids exhibit this level of organization
D.	All of these animals have a cavity between their digestive tract and body wall called as coelom
Answer» E.

8.	Platyhelmenthes exhibit organ level of organization.
A.	True
B.	False
Answer» B. False

9.	Which among the following is incorrect about tissue level of organization?
A.	Cells performing same functions group together to form a tissue
B.	Organs are absent
C.	Planaria exhibits this level of organization
D.	Cells are specialized with division of labour
Answer» D. Cells are specialized with division of labour

10.	Which among the following is incorrect about cellular level of organization?
A.	A group of cells combine to form the whole body
B.	Each cell carries over a specific function
C.	This level of organization is also called as cell aggregate of body plan
D.	Hydra exhibits this level of organization
Answer» E.

11.	Which among the following is incorrect about levels of organization in animals?
A.	Cells are organized in different ways to form the basic body in animals
B.	Cellular level of organization refers to the cluster of the cells that combine to form an animal body
C.	Tissue level of organization refers to the way tissues combine to form organs which in turn form animal body
D.	In organ system level of organization, various organs of the system work coordinately to achieve a specific function
Answer» D. In organ system level of organization, various organs of the system work coordinately to achieve a specific function

12.	Which among the following is not the basis of classification in Animalia?
A.	Segmentation
B.	Symmetry
C.	Mode of nutrition
D.	Levels of organization
Answer» E.