Biology - Online Test
Q1. What was the mixture of gases used in chamber marked A?
Answer : Option C
Explaination / Solution:
The gases used in Urey and Miller experiment in chamber marked A are Methane , ammonia , hydrogen , and water
Q2. Silk produced by Antheraeamylitta is called
Answer : Option B
Explaination / Solution:
The silk produced by Antheraeamylitta is called Tasar silk. This silk is considered as most durable and best quality silk.
Q3. Bulliform or motor cells are present in
Answer : Option D
Explaination / Solution:
In isobilateral leaves of monocot, certain adaxial epidermal cells along the veins modify themselves into large, empty, colourless cells. These are called bulliform cells.
Q4. Related genera belongs to same
Answer : Option B
Explaination / Solution:
Family is the group of genera having some common properties. So, related genera belongs to same family.
Q5. A fundamental category of classification ranking below a genus is
Answer : Option B
Explaination / Solution:
The taxonomic hierarchy Kingdom -> Phylum/Division -> Class -> Order -> Family -> Genus -> Species. Hence, the correct option is Species.
Q6. In higher plants, the growing apical bud inhibits the growth of the lateral buds. This phenomenon is called
Answer : Option D
Explaination / Solution:
Apical dominance is the phenomenon whereby the main, central stem of the plant is dominant over (i.e., grows more strongly than) other side stems; on a branch the main stem of the branch is further dominant over its own side branchlets.
Q7. Somaclonal variation appears in plants
Answer : Option D
Explaination / Solution:
Tissue culture is mode of vitro propagation of large number of plantlets in short interval of time. During tissue culture, plants parts are kept in nutrient medium along with required hormones. Some variation arises in plants body although having same genetic traits.
Q8. Primary consumer category in aquatic &/or terrestrial ecosystem will include :
Answer : Option D
Explaination / Solution:
Primary consumers obtain food from producers or autotrophs. In aquatic ecosystem phytoplankton are main prouder and zooplankton are primary consumers along with frog tadpole , snail and tortoise.
Q9. The joint present between the carpals is
Answer : Option D
Explaination / Solution:
Many gliding joints are formed in the appendicular skeleton between the carpal bones of the wrist; between the carpals and the metacarpals of the palm; between the tarsal bones of the ankle; and between the tarsals and the metatarsals of the foot.
Q10. A company has developed a GM maize plant which produces high amount of sugar. The right granted to the company because of which others cannot use it is
Answer : Option D
Explaination / Solution:
The right granted to the company or organization of which others cannot use it is called biopatent.
A biological patent is a patent on an invention in the field of biology that by law allows the patent holder to exclude others from making, using, selling, or importing the protected invention for a limited period of time.
This right is given as intellectual right to the company.
