Zoology - Online Test
Q1. All are biofuels except
Answer : Option D
Explaination / Solution:
Biopetrol is fuel having characteristic similar to petrol but is produced from palmitic acid. So, it is not a biofuel. Biodiesel, marsh gas and ethanol are biofuels produced by action of microbes.
Q2. Dinoflagellates possess condensed chromosomes even in interphase, their nucleus is called
Answer : Option B
Explaination / Solution:
Dinoflagellates are unicellular protists. They possess condensed chromosomes even during interphase. Their nucleus is called as mesokaryon.
Q3. The first step of recombinant DNA technology involves
Answer : Option D
Explaination / Solution:
The first step of recombinant DNA technology involves isolation of genetic material. This is performed by using enzymes that hydrolyzes the outer covering of cell as cellulase, chitinases pectinase etc.
Q4. During urine formation, the tubular cells secrete ------------------ into the filtrate.
Answer : Option D
Explaination / Solution:
The substances that are secreted into the tubular fluid (for removal from the body) include:
- Potassium ions (K+),
- Hydrogenions (H+),
- Ammonium ions (NH4+),
- creatinine,
- urea,
- some hormones,
- and some drugs (e.g. penicillin).
Q5. Which of the following is an example of divergent evolution?
Answer : Option A
Explaination / Solution:
In divergent evolution, same structure developed along different directions due to adaptation to different needs. Homologous organs are those organs that have common origin but performing different functions.
Q6. Animals that has become extinct in India is
Answer : Option B
Explaination / Solution:
The animals that were present earlier but now not available are called extinct animals. In India a number of animals have become extinctsuch as Cheetah.
Q7. Humus will never be
Answer : Option B
Explaination / Solution:
Humification leads to accumulation of dark coloured amorphous substance called humus that is highly resistance to microbial action and decompose at very slow rate.
Q8.
Match the following :
vertebra
a) Cervical
b) Coccyx
c) Thoracic
d) Lumbar
No.of bones feature
i) 5
ii) 4
iii)12
iv) 7
Answer : Option A
Explaination / Solution:
Vertebral column in general. The vertebral column usually consists of 33 vertebrae: 24 presacral vertebrae (7 cervical, 12 thoracic, and 5 lumbar) followed by the sacrum (5 fused sacral vertebrae) and the coccyx (4 frequently fused coccygeal vertebrae).
Q9. The animals that have had their DNA manipulated to possess and express an extra gene are known as
Answer : Option D
Explaination / Solution:
Transgenic animals are animals (most commonly mice) that have had a foreign gene deliberately inserted into their genome. Such animals are most commonly created by the micro-injection of DNA into the pronuclei of a fertilised egg which is subsequently implanted into the oviduct of a pseudopregnant surrogate mother. Transgenic cow, rat, rabbits and fish have been produced.
Q10. Greatest biological problems faced by human being is
Answer : Option B
Explaination / Solution:
The population is growing very fastly all over the world. Increased population demands more and more natural resources. Population explosion is the greatest biological problem faced by human beings world over.
