Zoology - Online Test
Q1. A category containing those species whose members survive only in captivity or as artificially supported populations far outside their historical geographic range is grouped under:
Answer : Option A
Explaination / Solution:
A taxon known only to survive in cultivation, in captivity or as a naturalized population (or populations) well outside the past range. A taxon is presumed Extinct in the Wild when exhaustive surveys in known and/or expected habitat, at appropriate times (diurnal, seasonal, annual), throughout its historic range have failed to record an individual. Surveys should be over a time frame appropriate to the taxon’s life cycle and life form.
Q2. During adolescence phase, Sunil’s body became abnormally large due to excessive growth of bones of his lower jaw and limbs.This abnormality is called
Answer : Option C
Explaination / Solution:
Acromegaly is the abnormal growth of the hands, feet and face caused by over production of growth hormone by pituitary gland.
Q3. A marine cartilaginous fish that can produce electric current is
Answer : Option B
Explaination / Solution:
Torpedo is a genus of rays, commonly known as electric rays, torpedo rays, or torpedoes. They are slow-moving bottom-dwellers capable of generating electricity as a defense and feeding mechanism.
Q4. Lyding cells synthesize and secretes testicular hormone called
Answer : Option B
Explaination / Solution:
Lyding cells synthesize and secrete testicular hormones called androgens. Androgens help in development of secondary sexual characters.
Q5. Identify the incorrect pair in the following
Answer : Option B
Explaination / Solution:
Haemoglobin present in blood transport gases, RNA ( tRNA and mRNA) are involved in proteinsynthesis and steroids are used as sex stimulating chemicals but glucose is not a storage product.
Q6. Fleming, Chain and Florey were awarded the Nobel Prize in 1945 for discovery of
Answer : Option A
Explaination / Solution:
Fleming, Chain and Florey were awarded the Nobel Prize in 1945 for discovery of antibiotics. Antibiotics prevent the growth of bacteria and fungi.
Q7.
Read the following statements :
i. when the heart is not pumping blood sufficient to meet the need of the body then this state is called as heart attack.
ii. when the heart stops beating due to irreversible death of cells then this state is called as heart failure.
Answer : Option C
Explaination / Solution:
The state when the heart is not pumping blood sufficient to meet the need of the body then this state is called heart failure. When the heart muscles is suddenly damaged due to inadequate blood supply is called heart attack.
Q8. Which one is most toxic
Answer : Option A
Explaination / Solution:
Out of the given gases carbon monoxide is the most toxic gas as it combine with hemoglobin present in blood and reduce the oxygen carrying capacity of blood.
Q9. The plane of alignment of chromosome at metaphase is referred to as
Answer : Option B
Explaination / Solution:
The plane of alignment of the chromosomes at metaphase is referred to as the metaphase plate. This stage is also called as tetrad stage.
Q10. Helium is used in Biolistic gun as
Answer : Option A
Explaination / Solution:
Biolistic gun is used to insert the foreign DNA into the target organism. The gene gun is utilized to bombard the plant cell wall with many DNA coated metal particles by using compressed helium as the propellant.
