Tag: zoology

Questions Related to zoology

The soil pollutants that affect the food chain and food web by killing microorganisms and plants are

zoology soil pollution industrial chemicals and their harmful effects toxic wastes and their effects soil pollution-causes

  1. Nitrogen oxides

  2. Pathogens

  3. Pesticides

  4. Agricultural wastes

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Correct Option: C
Explanation:

Pesticides are the chemical compounds which are used for the elimination of the harmful pests and insects. When the pesticides are used in excess, it results in the degradation of the soil and water quality. These are non-biodegradable compounds which enter the food chain and the concentration increases with the increase in the trophic level. The pesticides accumulation in the tissues causes toxicity in the organisms and leads to death. 

Thus, the correct answer is option C. 

Which of the following is dissolved in water to make a Bordeaux mixture?

zoology soil pollution industrial chemicals and their harmful effects toxic wastes and their effects soil pollution-causes

  1. Calcium chloride

  2. Copper sulphate

  3. Sodium chloride

  4. None of the above

Show answer
Correct Option: B
Explanation:

Bordeaux mixture is a combination of copper sulphate and hydrated lime. It is used mainly to control garden, vineyard and farm infestations of fungus.

Thus, the correct answer is option B.

Shell of egg in bird becomes thin (not properly formed) due to the pollution of pesticides. This is due to interference in the activity of

zoology soil pollution industrial chemicals and their harmful effects toxic wastes and their effects soil pollution-causes

  1. Ca ATPase

  2. Mg ATPase

  3. Calmodulin

  4. None of the above

Show answer
Correct Option: A
Explanation:

Due to chronic injection of pesticides like DDT in birds resulted in thinner and weaker shell. The Ca-ATPase pump responsible for transporting Ca which is inhibited by the pesticide and results in less Ca in the shell. Thus , the correct answer is option A. 

Which of the following statement is an impact of biomagnification?
A) Salmon exposed to a sub-lethal dose of the DDT increases the sensitivity to cold.
B) Dialdrin decreases the growth rate of female white-tailed deer.
C) The contamination caused at the primary level is less than the secondary level.

zoology soil pollution industrial chemicals and their harmful effects toxic wastes and their effects soil pollution-causes

  1. Both A and B

  2. Both A and C

  3. Only A

  4. A, B and C

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Correct Option: D

The process of accumulation of pesticides in a biological system is known as 

zoology soil pollution industrial chemicals and their harmful effects toxic wastes and their effects soil pollution-causes

  1. Bioaccumulation

  2. Bioconcentration

  3. Bioremediation

  4. All of the above

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Correct Option: A
Explanation:

The accumulation of chemicals in the living cells is known as bioaccumulation. When there is excessive use of the pesticides for the protection of fruits and vegetables against the harmful pests, this may lead to its accumulation in the food products. When these products are consumed, the chemicals deposit in the fatty tissues of the host. This phenomenon is called bioaccumulation of the chemicals in the living system.

Thus, the correct answer is option A.

Development of resistant strains of target pest is a

zoology soil pollution industrial chemicals and their harmful effects toxic wastes and their effects soil pollution-causes

  1. Positive effect of  bimagnification

  2.  Negative impact of pesticides

  3.  Negative impact of population

  4. Positive effect of using biosensor

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Correct Option: B

Integrated pest management aims at 

zoology soil pollution industrial chemicals and their harmful effects toxic wastes and their effects soil pollution-causes

  1. Controlling the number of pest

  2. Decreasing the development of pests resistance

  3. Increasing the pest resistance capability

  4. Both A and B

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Correct Option: D

.........., a related phenomenon, occurs when the genetic mutation that made the pest resistant to one pesticide also makes it resistant to others

zoology soil pollution industrial chemicals and their harmful effects toxic wastes and their effects soil pollution-causes

  1. Multiple resistance

  2. Cross-resistance

  3. Mutation

  4. Both A and B

Show answer
Correct Option: B
Explanation:
In multiple resistance the pests are resistant to more than one class of pesticide. This can happen when pesticides are used in sequence, with a new class replacing one to which pests display resistance with another.
Cross resistance occurs when the genetic mutation that made the pest resistant to one pesticide also makes it resistant to others, often those with a similar mechanism of action.
Mutation is the changing of the structure of a gene, resulting in a variant form which may be transmitted to subsequent generations.
So, the correct answer is option B.

Which of the following is involved in inhibition of growth of plants which is produced due to human activities?

zoology soil pollution industrial chemicals and their harmful effects toxic wastes and their effects soil pollution-causes

  1. Auxins

  2. Phytotoxin

  3. Mycotoxins

  4. Antitoxins

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Correct Option: B
Explanation:

Auxin is a plant hormone which causes the elongation of cells in shoots and is involved in regulating plant growth.
Phytotoxins refers to substances that are inhibitory to the growth of or poisonous to plants. Phytotoxic substances may result from human activity, as with herbicides, or they may be produced by plants, by microorganisms, or by naturally occurring chemical reactions.
Mycotoxins are toxic chemical products produced by fungi that readily colonize crops.
Antitoxins are antibodies that counteracts a toxin.
So, the correct answer is option B.

Which of the following has the potential of thyroid disruption properties in rodents?

zoology soil pollution industrial chemicals and their harmful effects toxic wastes and their effects soil pollution-causes

  1. Atrazine

  2. Carbamate

  3. Triazole

  4. Both B and C

Show answer
Correct Option: D