Zoology - Online Test
Q1. The plant cell wall are made up of
Answer : Option B
Explaination / Solution:
Plant cell walls are made of cellulose. Paper made from plant pulp is cellulose.
Q2. Which one of the following is not used in organic farming?
Answer : Option C
Explaination / Solution:
In organic farming snail is not used. Glomus is kind of fungi used in organic farming for maintaining fertility of soil. Earthworm the process of composting to form vermiform compost and Oscillatoria is an algae that fix the nitrogen.
Q3. Angina pectoris is very often mistaken for :
Answer : Option C
Explaination / Solution:
Angina pectoris is the sensation of chest pain, pressure or squeezing or pain in the centre of the chest. These symptoms are often mistaken by indigestion.
Q4. Which of the following can be categorised as a biological pollutant
Answer : Option D
Explaination / Solution:
Mildew is thin white coating consisting of minute fungal hyphae growing on woods, leather or paper. It is a biological pollutant. Heavy metal, industry wastes and organophosphates are physical components.
Q5. Crossing over results in exchange of genetic material, which occurs between
Answer : Option C
Explaination / Solution:
Crossing over is the exchange of genetic material between non-sister chromatids of two homologous chromosomes involved in the pairing process.
Q6. Production of large scale recombinant products can be done in
Answer : Option B
Explaination / Solution:
Bioreactor is a large vessels in which large scale raw materials are biologically converted into specific products.
Bioreactor is used to produce large scale production.
Q7. Urea cycle operates in :
Answer : Option A
Explaination / Solution:
Urea cycles operates in liver, where ammonia is converted into urea. Sometimes urea cycle also occurs in kidney.
Q8. Assertion: The earliest organisms that appeared on the earth were non-green and presumably anaerobes.
Reason: The first autotrophic organisms were the chemo-autotrophs that never released oxygen.
Reason: The first autotrophic organisms were the chemo-autotrophs that never released oxygen.
Answer : Option D
Explaination / Solution:
Primitive earth was devoid of oxygen so, only those organisms that were able to survive within anaerobic conditions developed. All these were heterotrophic organisms (taking nutrients from outside). Then after autotrophic organisms were developed that used inorganic sources such as H2S,NH3,CH4 as the principle sources of energy. These oganisms are called chemo-autotrophs.
Q9. In a hierarchical system of classification of plants, which of the following taxonomic rank ends in ‘ceae’?
Answer : Option A
Explaination / Solution:
Plant families like Convolvulaceae, Solanaceae are included in the order Polymoniales mainly based on the floral characters. Hence, the correct option is Family.
Q10. Examples of local and global nutrient cycles will be:
Answer : Option B
Explaination / Solution:
Phosphorus cycle occurs at local level in an ecosystem as it is mainly derived from soil. Carbon cycles occurs through environment and affected by different ecosystem present on earth surface. So, carbon cycle is global in nature.
