Zoology - Online Test
Q1. Preventive birth control measure is
Answer : Option B
Explaination / Solution:
Preventive birth control measure is preventing sperms from entering the uterus. It includes periodic absentee, coitus interrupts etc.
Q2. The winter sleep in frog is called
Answer : Option C
Explaination / Solution:
During extreme heat and cold period, frog takes shelter in deep burrows to protect them from extreme environmental conditions. This is called as summer sleep (aestivation) and winter sleep (hibernation).
Q3. Genetic material for retrovirus is
Answer : Option C
Explaination / Solution:
The virus in which genetic material is RNA are called retrovirus. In this virus reverse transcription takes place to form DNA that synthesis proteins.
Q4. ____ from pharynx is conveyed into oesophagus by _____ .
Answer : Option B
Explaination / Solution:
Bolus from pharynx is conveyed into oesophagus by deglutition. Bolus is the semisolid chewed food mixed with saliva in mouth. The food from pharynx passed to oesophagus by swallowing.
Q5. Secondary plant products are of great use in commerce in making
Answer : Option C
Explaination / Solution:
Many secondary plant products are of great use in commerce in making drug and perfumes. The primary product of plants is carbohydrates synthesized during photosynthesis.
Q6. The stacks of closely packed thylakoids is called
Answer : Option D
Explaination / Solution:
Granum : A stacked membranous structure within the chloroplasts of plants and green algae that contains the chlorophyll and is the site of the light reactions of photosynthesis. The saclike membranes that make up grana are known as thylakoids.
Q7. Write and codon for anticodon on the t-RNA
Answer : Option B
Explaination / Solution:
The codon for anticodon UCA on t-RNA is AGU. U bonds with A and G bonds with U in RNA. t-RNA carries specific amino acids to form protein molecules.
Q8. In Molluscs, the rasping feeding organ is
Answer : Option D
Explaination / Solution:
The mouth of molluscs contains a file-like rasping organ for feeding, called radula.
Q9. Oogenesis starts
Answer : Option B
Explaination / Solution:
In female baby, oogenesis starts before the birth of baby after forming primary oocyte. Further development to ovum occurs after attaining puberty.
Q10. Deforestation is responsible for
Answer : Option B
Explaination / Solution:
Forests are habitat of large number of plants and animals along with microbes. Deforestation causes loss of habit and loss of speies living in that area that results into co-extinction.
