Zoology - Online Test
Q1.
Counter current mechanism :
i. It operates in all vertebrates.
ii. It produces hypertonic urine.
Answer : Option D
Explaination / Solution:
Counter current mechanism operates in mammals but not in all vertebrates. Due to counter current mechanism it produces hypertonic urine, highly concentrated.
Q2. Darwin judged the fitness of an individual by
Answer : Option C
Explaination / Solution:
Darwin judged the fitness of an individual by number of offspring the individual produce in particular niche. More the viable offspring formed the more fit the organism in that surrounding.
Q3. In which organism protoplasm and cellular structure is absent
Answer : Option D
Explaination / Solution:
The protoplasm and cellular structure is absent in Virus. Virus consists of genetic material (DNA or RNA) along with a capsule of protein without any cellular structure.
Q4. Which one of the following is the most important service provided by ecosystems:
Answer : Option C
Explaination / Solution:
Ecosystem services includes all activities performed by nature to benefits of human beings. The most important ecological service includes soil formation. Soil is essential for growth of plants that provide food to all living forms.
Q5. Which of the following is not a part of hip bone?
Answer : Option D
Explaination / Solution:
Hip bone or pelvic girdle consists of two coxal bones. Each coxal bone is formed by the fusion of three bones- ilium, ischium and pubis..
Q6. Dolly sheep is made by implanting oocyte at what stage
Answer : Option C
Explaination / Solution:
Dolly (5 July 1996 – 14 February 2003) was a female domestic sheep, and the first mammal cloned from an adult somatic cell, using the process of nuclear transfer.
Dolly had three mothers (one provided the egg, another the DNA and a third carried the cloned embryo to term). She was created using the technique of somatic cell nuclear transfer, where the cell nucleus from an adult cell is transferred into an unfertilized oocyte (developing egg cell) that has had its cell nucleus removed.
The hybrid cell is then stimulated to divide by an electric shock, and when it develops into a blastocyst it is implanted in a surrogate mother. Dolly was the first clone produced from a cell taken from an adult mammal.
Q7. In India, there is rapid decline in infant mortality rate and MMR due to
Answer : Option B
Explaination / Solution:
The rapid decline in IMR and MMR is due to more attention on RCH program that provide proper immunization before and after the birth of baby providing assistance in delivery and child care, all these together result into decline in dearth of infants and mother during pregnancy.
Q8. The cell lining the blood vessels are
Answer : Option D
Explaination / Solution:
Endothelium is a type of epithelium that lines the interior surface of blood vessels and lymphatic vessels, forming an interface between circulating blood or lymph in the lumen and the rest of the vessel wall. It is a thin layer of simple squamous called endothelial cells
Q9. Which archaebacteria is present in the guts of ruminant animals such as cows and buffaloes?
Answer : Option D
Explaination / Solution:
Methanogens are present in the guts of several ruminant animals such as cows and buffaloes and they are responsible for the production of methane (biogas) from the dung of these animals.
Q10. Diapause is shown by
Answer : Option C
Explaination / Solution:
Dispause is a period during which growth and development is suspended and physiological activity is diminished to adverse environmental condition. Diapause occurs in monarch butterfly and silk worm.
