Zoology - Online Test
Q1. Fertilizers will not
Answer : Option A
Explaination / Solution:
Fertilizers will increase the fertility of soil and higher production of crop. When reaches to water bodies it causes eutrophication. The chemicals present in it also pollute the water. Fertilizer never acts as biological control against harmful organisms.
Q2. The sexual reproduction involves fusion of special type of cells called gametes, produced by
Answer : Option D
Explaination / Solution:
Meiosis cell division is involved in gametes formation as gametes contain half the number of chromosomes that a normal cell diploid cell contains. Gametes fuse to produce diploid zygote .
Q3. DNA fragments move at different distances in Gel Electrophoresis because
Answer : Option C
Explaination / Solution:
Gel electrophoresis is a technique used to separate DNA fragments (or other macromolecules, such as RNA and proteins) based on their size and charge. Electrophoresis involves running a current through a gel containing the molecules of interest. Based on their size and charge, the molecules will travel through the gel in different directions or at different speeds, allowing them to be separated from one another.
During gel electrophoresis different fragments move at different distances due to difference in their molecular weight of the fragments. Smaller fragments move more towards anode.
Q4.
Read the following :
i. Avian kidneys have very short loops of Henle.
ii. Birds are unable to make urine as hypotonic as mammals can.
Answer : Option A
Explaination / Solution:
Avian kidneys have very short loops of Henle’s. Loops of Henle’s used in concentration of urine. Birds make urine highly hypotonic.
Q5. Assertion: Coacervates are believed to be the precursors of life.
Reason: Coacervates were self-duplicating aggregates of proteins surrounded by lipid molecules.
Reason: Coacervates were self-duplicating aggregates of proteins surrounded by lipid molecules.
Answer : Option C
Explaination / Solution:
Coacervates are believed to be the precursors of life. These molecules consists protein along with lipids. They are aggregates of proteins surrounded by lipid but self-duplicating ability were not present in them.
Q6. Triticum aestivum belong to the family
Answer : Option D
Explaination / Solution:
Triticum aestivum, common or bread wheat, is an annual grass in the Poaceae (grass family) native to the Mediterranean region and southwest Asia.
Q7. Successive transitional communities will show
Answer : Option D
Explaination / Solution:
During ecological succession, transitional communities or seral communities will show increase in the number of species due to addition of nutrient medium at successive stages of succession.
Q8. Read the following statements and view carefully the figure :
i. Osteoporosis is an age-related disorder characterised by decreased bone mass. Osteoarthritis is shown in the following figure.
ii. The above figure shows gouty arthritis which is caused by inflammation of joints.
iii. Decreased levels of estrogen is a common cause for increased chances of fractures.
iv. Inflammation of joints is caused by decreased levels of calcium ions in body fluids.
i. Osteoporosis is an age-related disorder characterised by decreased bone mass. Osteoarthritis is shown in the following figure.
ii. The above figure shows gouty arthritis which is caused by inflammation of joints.
iii. Decreased levels of estrogen is a common cause for increased chances of fractures.
iv. Inflammation of joints is caused by decreased levels of calcium ions in body fluids.
Answer : Option D
Explaination / Solution:
Osteoporosis is an age-related disorder characterised by decreased bone mass. It is mainly caused by decreased level of estrogen in blood. Osteoporosis may leads to increased chances of fracture.
Q9. An MNC exploiting biological resources (turmeric) of other nation without proper authorization will be called as
Answer : Option C
Explaination / Solution:
Exploiting biological resources of other nation without proper authorization from the country or people concerned without compensatory payment is called biopiracy.
Q10. World population day is celebrated on
Answer : Option B
Explaination / Solution:
World population day is celebrated on 11th July every year world over to create awareness about the ill effect of unchecked population explosion.
