Biology - Online Test
Q1. 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.
Q2. Aerating pores in the bark of plants is known as
Answer : Option B
Explaination / Solution:
In plants respiratory organs in stem is called lenticels. They are located as pores in the bark of plants.
Q3. Which one is not a phase of Growth
Answer : Option D
Explaination / Solution:
Growth phase consists of leg phase, exponential phase and stable phase. It do not consist of linear phase.
Q4. 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.
Q5. Which of the following is not method of asexual reproduction
Answer : Option A
Explaination / Solution:
Conjugation is the mode of sexual reproduction in amoeba and some other Moneras. Cutting, grafting and budding are the mode of asexual reproduction without gametes formation.
Q6. 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.
Q7. 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..
Q8. 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.
Q9. 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.
Q10. Select the correct equation from the following
Answer : Option C
Explaination / Solution:
Water potential of a cell is affected by both solute and pressure potential. The relationship between them is as follows:
