Zoology - Online Test
Q1. Selective breeding of organisms (Animal husbandry and plant breeding programs) for specific desirable characteristics are examples of
Answer : Option C
Explaination / Solution:
In animal husbandry and plant breeding, specific desirable characteristics are obtained by selective breeding. The plants or animals having specific traits are crossed to obtain required traits. It is a kind of artificial selection.
Q2. “SystemaNaturae” is a book written by
Answer : Option A
Explaination / Solution:
‘SystemaNaturae’is a book written by Carolus Linneaus. This books gives in depth details of classification system and binomial nomenclature of organisms.
Q3. Among desert plants, which of the following will become a limiting for primary production
Answer : Option B
Explaination / Solution:
Primary productivity is of plants depends upon availability of water, sunlight, chlorophyll, carbon dioxide etc. but in desert plants water is the main limiting factor as very less amount of water is available to plants in deserts.
Q4. Myasthenia gravis leads to fatigue and weakness. It is not :
Answer : Option B
Explaination / Solution:
Myasthenia gravis is an auto immune disorder affecting neuromuscular junction leading to fatigue, weakening and paralysis of skeletal muscle.
Q5. Plasmid used to produce humulin is
Answer : Option B
Explaination / Solution:
Plasmid are extra nuclear genetic materials present in bacterial humulin is produced by using plasmid Pbr322. It is an E.coli plasmid vector containing the origin of replication.
Q6. Cutting and tiding of fallopian tube to avoid pregnancy is called
Answer : Option C
Explaination / Solution:
Cutting and tiding of fallopian tube to avoid pregnancy is called tubectomy. It is a surgical method of contraception. This method is used only when no more child is required in future. It can be done only in female.
Q7. The matrix of bone and cartilage can be distinguished by the presence of
Answer : Option D
Explaination / Solution:
The matrix of bone and cartilage differ by the presence of haversian canal that makes bone hard and stiff. On the other hand, cartilage are flexible.
Q8. The genetic material of virus is
Answer : Option C
Explaination / Solution:
Most viruses have either RNA or DNA as their genetic material. The nucleic acid may be single- or double-stranded.
The entire infectious virus particle, called a virion, consists of the nucleic acid and an outer shell of protein.
Q9. Temperature is an environmental factor that does not affect
Answer : Option C
Explaination / Solution:
Temperature is an environmental factor that influence the type and number of species in a given habitat. Temperature may change the enzyme kinetics, physiology and geographical distribution of species. Photoperiod is the duration of light that fall on plant and not affected by temperature.
Q10. The reflex action of vomiting is controlled by
Answer : Option A
Explaination / Solution:
Vomiting is believed to be controlled by two distinct brain centres—the vomiting centre and the chemoreceptor trigger zone—both located in the medulla oblongata.
The vomiting centre initiates and controls the act of emesis, which involves a series of contractions of the smooth muscles lining the digestive tract.
