Zoology - Online Test
Q1. The excretory organ of Saccoglossus is
Answer : Option B
Explaination / Solution:
Saccoglossus belong to phylum Hemichordata and hence the excretory organ is proboscis gland.
Q2. Antrum is the cavity of
Answer : Option A
Explaination / Solution:
Ovary contains large number of Graafian follicle that maturates to produce ovum or egg. A small cavity is present in Graafian follicle called antrum.
Q3. Plants can synthesis all types of fatty acids but animals lacks machinery to synthesis three fatty acids called essential fatty acids. They are
Answer : Option A
Explaination / Solution:
Plants can synthesis all types of fatty acids but animal cells lacks machineryto synthesis three fatty acids called as essential fatty acids. These are Linoleic , Linolenic and Arachidonic acids
Q4. Human insulin is being commercially produced from a transgenic species of
Answer : Option C
Explaination / Solution:
Human insulin is artificially prepared chemicals used by diabetic patients. This hormone is obtained from genetically engineered Escherichia bacterium that can reproduce rapidly.
Q5. In which conference held in 1997, the rich nations have agreed to limit the emission of green house gases.
Answer : Option C
Explaination / Solution:
The Kyoto Protocol was adopted in Kyoto, Japan, on 11 December 1997
The Kyoto Protocol is an international agreement linked to the United Nations Framework Convention on Climate Change, which commits its Parties by setting internationally binding emission reduction targets.
Recognizing that developed countries are principally responsible for the current high levels of GHG emissions in the atmosphere as a result of more than 150 years of industrial activity, the Protocol places a heavier burden on developed nations under the principle of "common but differentiated responsibilities."
Q6. In plant cells, the new cell wall begins by the
Answer : Option B
Explaination / Solution:
In plant cells, wall formation starts in the centre of the cell and grows outward to meet the existing lateral walls. The formation of the new cell wall begins with the formation of a simple precursor, called the cell plate which hardens to give rise to middle lamella.
Q7. EtBr is a mutagen as
Answer : Option A
Explaination / Solution:
EtBR or Ethidium Bromide is widely used nucleic acid stain and very strong mutagen and carcinogen. It causes mutation that cause variation or introduction of new traits.
Q8. The animals of cold countries have relatively shorter and poorly developed ear, eyes, hair and other phenotypic characters. This is known by which law?
Answer : Option B
Explaination / Solution:
Allen's rule. The principle holding that in a warm-blooded animal species having distinct geographic populations, the limbs, ears, and other appendages of the animals living in cold climates tend to be shorter than in animals of the same species living in warm climates.
The animals of cold countries have relatively shorter and poorly developed ear, eyes, hair and other phenotypic characters to avoid cold condition.
Q9. The branch of study that deals of identification, nomenclature and classification is called
Answer : Option B
Explaination / Solution:
Taxonomy is the branch of biological science that deals of identification, nomenclature and classification of organisms according to certain sets of rules.
Q10. The metabolic process which causes a reduction in gross primary production:
Answer : Option A
Explaination / Solution:
Respiration causes a reduction in gross primary productivity of an ecosystem. Gross primary productivity – Respiration = Net primary productivity.
