Zoology - Online Test
Q1. A gas produced by paddy fields and involved in global warming is
Answer : Option D
Explaination / Solution:
Anaerobic decomposition of plants in water produces methane gas in paddy field. This gas is involved in global warming as methane is a green house gas beside carbon dioxide.
Q2. At the end of meiosis II how many cells are formed?
Answer : Option B
Explaination / Solution:
Four haploid cells are formed at the end of meiosis II. It is reductional division resulting in halving of chromosome number in daughter cells.
Q3. Electroporation helps in the introduction of foreign DNA into target organism by
Answer : Option D
Explaination / Solution:
Electroporation, or electropermeabilization, is a microbiology technique in which an electrical field is applied to cells in order to increase the permeability of the cell membrane, allowing chemicals, drugs, or DNA to be introduced into the cell.
In microbiology, the process of electroporation is often used to transform bacteria, yeast, or plant protoplasts by introducing new coding DNA.
Q4. What are the unlabeled a, b & c in the given flow chart ?
Answer : Option D
Explaination / Solution:
Renin convert angiotensin I to angiotensin II which activates adrenal cortex to release aldosterone. Aldosterone helps to reabsorption of sodium and water from DCT.
Q5. The process of evolution of different species in a given geographical area starting from a point and radiating to other geographical area is called
Answer : Option B
Explaination / Solution:
In evolutionary biology, adaptive radiation is a process in which organisms diversify rapidly from an ancestral species into a multitude of new forms, particularly when a change in the environment makes new resources available, creates new challenges, or opens new environmental niches.
Q6. Choose the correct sequence of taxonomic categories in descending order
Answer : Option A
Explaination / Solution:
The correct sequence of taxonomic categories form higher to lower are Division-Class-Order-Family-Genus-Species.
Q7. Earth crust is the reservoir of sedimentary type of nutrients like
Answer : Option A
Explaination / Solution:
Earth crust is the reservoir of sedimentary type of nutrients like phosphorus. Atmosphere is the reservoir of gaseous types of cycle like oxygen and nitrogen along with carbon.
Q8. Select the correctly matched pair :
Answer : Option A
Explaination / Solution:
Last 2 pairs i.e., 11th and 12th of ribs are not connected ventrally and are therefore, called floating ribs.
Q9. Which of the following is not a use of transgenic animals?
Answer : Option D
Explaination / Solution:
Transgenic animals are developed to study normal physiology and development, vaccine testing, chemical safety testing, obtaining biological product etc. These animals are not used to study viral disease.
Q10.
Assertion: There is a statutory ban amniocentesis on sex determination in India.
Reason: Amniocentesis is used to determine sex of foetus for female foeticide.
Answer : Option C
Explaination / Solution:
The statutory ban on amniocentesis for sex determination is due to increasing female foeticide after knowing the sex of baby using the chromosomal pattern of amniotic fluid surrounding the foetus.
