Biology - Online Test
Q1. 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.
Q2. The oils have
Answer : Option C
Explaination / Solution:
Oils have lower melting point (e.g., gingely oil) and hence remain as oil in winters.
Q3. A person with unknown blood group under ABO system has suffered much blood loss in an accident and needs immediate blood transfusion. His one friend, who has a valid certificate of his own blood type, offers for blood donation without delay. What would have been the type of blood group of the donor friend?
Answer : Option D
Explaination / Solution:
A person with unknown blood group under ABO grouping should be given Type O blood group as O is universal donor and can be transfused to any person.
Q4. Energy is stored in the form of
Answer : Option C
Explaination / Solution:
Cells store energy in a molecule called adenosine triphosphate (abbreviated as ATP). The adenosine molecule has three phosphate groups attached to it (triphosphate means three phosphates) which are held together by high energy bonds.
If one of these bonds is broken, a great amount of energy is released which can be used in an endergonic reaction.
Q5. 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.
Q6. 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.
Q7. 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.
Q8. 120 0 1200 phyllotaxy occurs in
Answer : Option A
Explaination / Solution:
Phyllotaxy is the arrangement of leaves on a plant stem. 1200 phyllotaxy occurs in Tristichousarrangementin which three leaves are arranged at each node.
Q9. In some plants diploid embryo sac develop directly from diploid megaspore mother cell. This condition is called as Megaspore mother cell are diploid, which generally undergo reduction division to produce megaspore but in some plants diploid megaspore mother cell directly produce diploid embryo sac this condition is called diplospory
Answer : Option D
Explaination / Solution:
Megaspore mother cell are diploid, which generally undergo reduction division to produce megaspore but in some plants diploid megaspore mother cell directly produce diploid embryo sac this condition is called diplospory
Q10. 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.
