Zoology - Online Test
Q1. Wall of uterus has ------- layers of tissues.
Answer : Option C
Explaination / Solution:
The wall of uterus has three layers of tissues. The outer most layer is called perimetrium followed by myometrium and innermost glandular tissue is endometrium.
Q2. Which of the following metabolites are incorrect pairs?
Answer : Option D
Explaination / Solution:
Ricin and abrin are toxins.
Q3. A nitrogen fixing microbe associated with Azolla in rice fields is
Answer : Option A
Explaination / Solution:
A number of microbes are present in rice field, Azolla and Anabaena are two common bacteria found in rice field that fix the atmospheric nitrogen.
Q4. In the systemic circulation, blood vessel that carries blood from the intestine to liver is named :
Answer : Option C
Explaination / Solution:
The hepatic portal vein carries blood from intestine to the liver before it is delivered to the systemic circulation.
Q5. DDT is a
Answer : Option C
Explaination / Solution:
DDT is a non-biodegradable pollutant used as pesticides in agricultural field. It pollutes the air, water and soil if used in form of spray.
Q6. In which stage of mitosis, the number and shape of chromosome can be observed?
Answer : Option C
Explaination / Solution:
The metaphase is characterised by all the chromosomes coming to lie at the equator with one chromatid of each chromosome connected by its kinetochore to spindle fibres from one pole and its sister chromatid connected by its kinetochore to spindle fibres from the opposite pole.
Q7. Thermostable DNA polymerase is isolated from bacterium
Answer : Option D
Explaination / Solution:
Taq polymerase is a thermostable DNA polymerase named after the thermophilic bacterium Thermus aquaticus from which it was originally isolated by Chien et al. in 1976.Its name is often abbreviated to Taq Pol or simply Taq. It is frequently used in the polymerase chain reaction (PCR), a method for greatly amplifying the quantity of short segments of DNA. It remain active during high temperature induced denaturation of double stranded DNA.
Q8. During micturition, the muscles of urinary bladder and urethral sphincters will
Answer : Option A
Explaination / Solution:
The CNS passes on motor messages to initiate the contraction of smooth muscles of the bladder and simultaneous relaxation of the urethral sphincter causing the release of urine.
Q9. According to Darwin, evolution is
Answer : Option B
Explaination / Solution:
According to Charles Darwin, evolution is a very slow and gradual process. He believed that evolution took place over a very long period of time. When we talk about time period in evolution we usually refer to billions of years. The generation of a species from another takes a long period of time. It is a very steady process as the changes and adaptation take long time to stabilise and give rise to a new species.
Q10. The highest categories of classification is
Answer : Option C
Explaination / Solution:
The taxonomic hierarchy Kingdom -> Phylum/Division -> Class -> Order -> Family -> Genus -> Species. Hence, the correct option is Kingdom.
