Biology - Online Test
Q1. Endemics of western Ghats include
Answer : Option C
Explaination / Solution:
Endemism is the ecological state of a species being unique to a defined geographic location, such as an island, nation, country or other defined zone, or habitat type.
Notable endemics are the Nilgiri leaf monkey and the brown and carmine Beddome's toad of the Western Ghats.
Q2.
Match the following :
| Hormone | Synonym |
| a) Adrenaline | i) birth hormone |
| b) Oxytocin | ii) moulting hormone |
| c) Ecdyson | iii)luteotropic hormone |
| d) Prolactin | iv) fight or flight hormone |
Answer : Option A
Explaination / Solution:
Adrenaline hormone is called fight and flight hormone. Oxytocin is called birth hormone. Ecdyson is called moulting hormone and prolactin is called as luteotropic hormone.
Q3. Which one of the following is a living fossil?
Answer : Option D
Explaination / Solution:
Limulus (the king crab or horse-shoe crab) continues to remain unchanged for past 190 million years. It is therefore, also called living fossil. Excretion occurs through four pairs of coxal glands. Respiration occurs through book gills.
Q4. Testes are located outside the abdominal cavity in scrotum because
Answer : Option D
Explaination / Solution:
The testes are located outside the abdominal cavity in a pouch called scrotum. The scrotum helps in maintaining the low temperature of testes necessary for spermatogenesis.
Q5. Which is the neutral amino acid?
Answer : Option C
Explaination / Solution:
Side chains which have pure hydrocarbon alkyl groups (alkane branches) or aromatic (benzene rings) are non-polar. Examples include valine, alanine, leucine, isoleucine, phenylalanine.
Q6. A cross between AaBB X aaBB yields a genotypic ratio of
Answer : Option D
Explaination / Solution:
Genotypic ratio of cross between AaBB and aaBB will be 1:1 as AaBB and aaBB in F1 generation.
Q7. Anaerobic respiration of yeast produces
Answer : Option D
Explaination / Solution:
Anaerobic respiration in some microorganisms such as yeast produces ethanol and carbon dioxide, as opposed to lactic acid.
Glucose is achieved under anaerobic conditions by sets of reactions.
It can be summarised by the following equation:
glucose → ethanol + carbon dioxide ( + energy released)
Q8.
Read the following :
i. Blood vessels include arteries and veins. Arteries carry blood from heart to body parts and veins bring back blood from body parts to heart.
ii. The blood vessel which carry blood from heart to lungs is pulmonary artery and it carries oxygenated blood.
Answer : Option A
Explaination / Solution:
Blood vessels includes arteries and veins. Arteries carry blood from heart to body parts and veins bring back blood from body parts to heart. Pulmonary artery carry deoxygenated blood.
Q9. A sewage treatment process in which a part of decomposer bacteria present in the wastes is recycled into the starting of the process is called
Answer : Option A
Explaination / Solution:
Activated sludge treatment is a step in sewage treatment in which a part of decomposer bacteria present in wastes is recycled into the starting of treatment to maintain bacteria.
Q10. Effects of thermal pollution of water include :
a) increased BOD
b) increased toxicity of discharged chemicals
c) decreased microbial activity
a) increased BOD
b) increased toxicity of discharged chemicals
c) decreased microbial activity
Answer : Option D
Explaination / Solution:
An effect of thermal pollution of water includes increased Biological Oxygen Demand (BOD) and decreased microbial activity. Some organisms are able to survive only at normal temperature.
