Zoology - Online Test
Q1. 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.
Q2. 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.
Q3.
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.
Q4. 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.
Q5. 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.
Q6. The mechanism of distributing centriole pairs to the daughter cells is called
Answer : Option A
Explaination / Solution:
The mechanism of distributing chromosomes to the daughter cells is called astral division. This kind of division occurs in animal cells.
Q7. The polyacrylamide gel is used to separate proteins as
Answer : Option B
Explaination / Solution:
Protein molecules are smaller than DNA polynucleotide. Protein and DNA can be separated by polyacrylamide gel having minute pores through which protein can pass but not the DNA.
Q8. The filtration fraction is the ratio of GFR to RPF where both the values are in ml/min and FF is expressed in percentage. Calculate FF for a normal adult human being, if RPF= 600ml/min :
Answer : Option D
Explaination / Solution:
Filtration fraction is the ratio of glomerular filtration rate (GFR) to the renal plasma flow (RPF). GFR of normal human is 120 ml/min. so,
FF =
= = 20%.
Q9. An important evidence in favour of organic evolution is the occurrence of
Answer : Option D
Explaination / Solution:
There are many evidences that favor the organic evolution of life. According to this concept life originate from pre-existing organisms by evolution in cousr of time. Homologous and vestigial organs hit the uses of different organs in different organism for different purpose.
Q10. Wildlife is destroyed most when
Answer : Option C
Explaination / Solution:
Wildlife is destroyed most when natural habitat is destroyed. The organisms survive and reproduce only in the natural habitat. Loss of habitat of wild animals is the main reason behind the extinction of organisms,
