Zoology - Online Test
Q1. Forest act was first enacted in
Answer : Option B
Explaination / Solution:
An Act to consolidate the law relating to forests, the transit of forest-produce and the duty leviable on timber and other forest-produce. The Indian Forest Act, 1927 was largely based on previous Indian Forest Acts implemented under the British.
Q2. During mitosis ER and nucleolus begin to disappear at
Answer : Option C
Explaination / Solution:
During mitosis ER and nucleolus begin to diappear at late prophase stage indicated the beginning of next phase. It happens due to increased divisional activities of nucleus.
Q3. The tendency of population to remain in genetic equilibrium may be disturbed by
Answer : Option C
Explaination / Solution:
The tendency of population to remain in genetic equilibrium may be disturbed by lack of random mating due to ethics and geographical or other barriers.
Q4. Which one is a obligate category of classification?
Answer : Option D
Explaination / Solution:
Family is the obligate category of classification as it forms the basic functional unit of classification. Family includes all the related species having similar charecters.
Q5. Vasectomy is a surgical method of birth control performed in
Answer : Option B
Explaination / Solution:
Vasectomy is surgical method of birth control in male in which vas deference is cut and tides to prevent release of sperm during coitus. This method cannot be reversed back.
Q6.
Match the following with reference to frog
Column I
a) Medulla oblongata
b) Smell
c) Touch
d) Cranial nerves
Column II
i) Sensory papillae
ii) PNS
iii) Foramen magnum
iv) Nasal epithelium
Answer : Option B
Explaination / Solution:
The medulla oblongata passes out through the foramen magnum and continues into spinal cord, which is enclosed in the vertebral column. Frog has different types of sense organs. This includes organs of touch (sensory papillae) and smell (nasal epithelium). The nervous system is organized into a central nervous system including brain and spinal cord and peripheral nervous system (PNS) including cranial and spinal nerves.
Q7. The organism that completely lack a cell wall and are smallest living cell know, can survive without oxygen is
Answer : Option D
Explaination / Solution:
Mycoplasmas are group of organism that lack cell wall and are smallest living organisms. They can survive without oxygen. Mycoplasmas are also called as PPLO (pleuro pneumonia like organism).
Q8. Removal of introns and joining of exons in a defined order during transcription is called
Answer : Option C
Explaination / Solution:
The mRNA produced by transcription of DNA consists of exons and introns. The removal of introns and joining of exons to obtain mature mRNA is called splicing. It is followed by capping and tailing.
Q9. Which of the following control the function of Sertoli cell?
Answer : Option A
Explaination / Solution:
FSH (follicle stimulating hormone) stimulates Sertoli cells to secrete spermatogenic substance. Sertoli cells function as nurse cells for differentiating spermatozoa.
Q10. Shifting cultivation practiced in India is called
Answer : Option B
Explaination / Solution:
Shifting cultivation practiced in India is called jhum cultivation in which forest is cleaned for agriculture practice and after few years this area is abandoned and another forest land is cleared.
