Zoology - Online Test
Q1. Read the following statements :
a) India is considered as one of the 12 mega diversitycenters of the world.
b) India contributes to a high percentage of global species diversity.
a) India is considered as one of the 12 mega diversitycenters of the world.
b) India contributes to a high percentage of global species diversity.
Answer : Option D
Explaination / Solution:
The megadiverse countries are a group of countries that harbor the majority of Earth's species and high numbers of endemic species. Conservation International identified 17 megadiverse countries in 1998.
India is one of the twelvemega diversity countries of the world with bio-diversity hot spots such as Eastern Himalayaand the Western Ghats,
With only 2.4% of world's land area, India accounts for 7-8% of recorded species of the world. In terms of species richness, India ranks seventh in mammals, ninth in birds and fifth in reptiles.
Q2.
Match the names of organ having isolated endocrine cells with hormone secreted by those cells :
| Organ | Hormone |
| a) Kidney | i) angiotensin |
| b) Liver | ii) Erythropoietin |
| c) Gastro-intestinal Tract | iii) ANF |
| d) Heart | iv) CCK |
Answer : Option C
Explaination / Solution:
The atrial wall of our heart secretes a very important peptide hormone called ANF.
Angiotensin I is produced by the action of renin (an enzyme produced by the kidneys) on a protein called angiotensinogen, which is formed by the liver.
The juxtaglomerular cells of kidney produce a peptide hormone called erythropoietin.
The gastro-intestinal tract secrete peptide hormone called CCK.
Q3. Petromyzon is included under
Answer : Option D
Explaination / Solution:
Petromyzon is a jawless vertebrate and hence included under Agnatha.
Q4. Endometrium is the lining of
Answer : Option B
Explaination / Solution:
The inner lining of uterus is called endometrium. It gets ruptured at the beginning of menstrual cycle and comes out through vagina along with blood vessels. It is formed in expectation of pregnancy every month.
Q5. Chitin occurs in cell wall of
Answer : Option C
Explaination / Solution:
The cell wall of fungi is made of chitin,complex sugar molecules. The cell wall of plants are made up of cellulose.
Q6. Read the following :
i. The instrument used for recording heart’s electrical events is named electrocardiogram.
ii. In any ECG the part of base line between any two deflections is called interval.
iii. Abnormality in the working of heart changes wave pattern of ECG.
i. The instrument used for recording heart’s electrical events is named electrocardiogram.
ii. In any ECG the part of base line between any two deflections is called interval.
iii. Abnormality in the working of heart changes wave pattern of ECG.
Answer : Option B
Explaination / Solution:
ECG is a graphical representation of the electrical activity of the heart during a cardiac cycle.
Q7. Use of biocontrol measures will greatly reduce our dependence on
Answer : Option B
Explaination / Solution:
The use of biocontrol measures will greatly reduce our dependence on toxic chemicals and pesticides. Insects and pests are not killed in this method but kept undercontrol.
Q8. Mass destruction of aquatic life will be caused by:
Answer : Option D
Explaination / Solution:
Mass destruction of aquatic life will be caused by broad spectrum pesticides. Broad spectrum pesticides are effective against large number of pests whether useful or harmful. These pesticides reaches to water bodies along with rain water.
Q9. Division of nucleus without being followed by cytokinesis results into
Answer : Option A
Explaination / Solution:
The division of nucleus or karyokinesis without being followed by cytokinesis results into increase in the content of nucleus, a condition known as multinucleate condition.
Q10. Overhangs produced by restriction enzymes are called as
Answer : Option D
Explaination / Solution:
Longer overhangs are called cohesive ends or sticky ends. They are most often created by restriction endonucleases when they cut DNA.
