Zoology - Online Test
Q1. The nuclear structures disappear during
Answer : Option C
Explaination / Solution:
The nuclear envelope and the nucleolus disappear and the spindle fibres start forming at the opposite poles of the cell. Metaphase is marked by the alignment of chromosomes at the equatorial plate.
Q2. The separation and purification of recombinant protein product is called as
Answer : Option A
Explaination / Solution:
Downstream processing is the separation and purification of recombinant protein product. Downstream processing and quality control testing vary for different products.
Q3. The hormone with enzymatic action which catalyses conversion of angiotensinogen into angiotensin is :
Answer : Option B
Explaination / Solution:
A fall in glomerular blood flow/glomerular blood pressure/GFR can activate the JG cells to release renin which converts angiotensinogen in blood to angiotensin I and further to angiotensin II.
Q4. The theory of use and disuse was given by
Answer : Option D
Explaination / Solution:
The theory of use and disuse was given by Lamarck. In his theory of organic evolution he stressed that those traits or organs are used more evolve faster and those are not used degenerate in course of time.
Q5. A living organism can be unexceptionally differentiated from nonliving structure on the basis of
Answer : Option A
Explaination / Solution:
A living organism can be differentiated from non-living structures on the basis of reproduction. All the living organism reproduce unexceptionally for continuation of species.
Q6. The scientist who put price tag of US$ 33 trillion a year for nature’s life-support services was
Answer : Option C
Explaination / Solution:
Robert Costanza is the director and founder of the Gund Institute for Ecological Economics at the University of Vermont, and cofounder of the International Society for Ecological Economics.
In 1997, Costanza and his colleagues made news headlines around the world with a paper, published in the British journal Nature, that estimated the annual net worth of the biosphere: $33 trillion, a figure greater than the annual gross national products (GNP) of all the world’s economies combined.
Q7. The upright posture in humans is facilitated by :
Answer : Option D
Explaination / Solution:
The upright posture in human is facilitated by massive hind limbs bones that makes broad feet and pelvis to with hold the weight of whole body.
Q8. Dolly sheep was produced due to property of the cells called as
Answer : Option D
Explaination / Solution:
The cells of embryo are totipotent that means that they have ability to produce whole new organism form single cell. Dolly sheep was produced due to property of totipotency.
Q9. The percentage of ratio of natality over mortality is called
Answer : Option B
Explaination / Solution:
Natality is the total number of new population added into existing population by birth on the other hand mortality means no of death in a particular geographical area or population. The ratio of natality and mortality is called vital index.
Q10. A normal adult man and woman have ---------WBC per cubic millimetre.
Answer : Option B
Explaination / Solution:
A normal adult male and female have about 4.5 to 5 million of WBC per cubic millimeterof blood. The number of white blood cells increases during infection against pathogens.
