Zoology - Online Test
Q1. When the coelomic fluid serves as a skeleton it is known as
Answer : Option B
Explaination / Solution:
Coelomic fluids serves as a skeleton in some insects called as hydrostatic skeleton that help in maintaining shape and size of the body of organisms in absence of bone or cartilage.
Q2. Bidder’s canal is meant for the passage of
Answer : Option C
Explaination / Solution:
Bidder’s canal is present in male reproductive system. It is meant for passage of sperms during coitus.
Q3. The oils have
Answer : Option C
Explaination / Solution:
Oils have lower melting point (e.g., gingely oil) and hence remain as oil in winters.
Q4. The specialised patch of modified heart muscles from where contraction initiates, is/are :
Answer : Option C
Explaination / Solution:
The nodal musculature has the ability to generate action potentials without any external stimuli. The number of action potentials that could be generated in a minute vary at different parts of the nodal system. The SAN can generate the maximum number of action potentials and is responsible for initiating and maintaining the rhythmic contractile activity of the heart. Therefore, it is called the pacemaker.
Q5. Secondary treatment of sewage is also called
Answer : Option C
Explaination / Solution:
Secondary treatment of sewage is also called biological treatment because in this treatment aeration of sewage water is done that increase the microbes that decompose the organic materials in sewage water.
Q6. Low BOD will be characteristic feature of :
Answer : Option B
Explaination / Solution:
Low biological oxygen demand (BOD) will be characteristic feature of an oligotrophic lake. In oligotrophic lake concentration of nutrients are very low so a few organisms only survive and BOD is comparatively low.
Q7. Plant Cytokinesis differ from animals Cytokinesis in having
Answer : Option B
Explaination / Solution:
In plants, cytokinesis or division of cytoplasm occurs due to cell plate formed out of deposition of materials along the equatorial region of cell but in animals cytokinesis occurs due to formation of cleavage furrow in the middle cell membrane.
Q8. Proteins can be digested by
Answer : Option C
Explaination / Solution:
Proteases are involved in digesting long protein chains into shorter fragments by splitting the peptide bonds that link amino acid residues.
Protein can be digested by using enzyme protease to obtain DNA. In chromosome DNA is wrapped on histone protein.
Q9. pH of urine under healthy conditions is :
Answer : Option C
Explaination / Solution:
The pH of urine under healthy conditions is slightly less than 7 so, slightly acidic in nature.
Q10. Which of the following are not the examples of analogous structures?
Answer : Option C
Explaination / Solution:
Analogous structure is that structure which performs similar function in spite of different origin. Wings of bat and forelimb of cattle do not perform same function and have common origin.
