Fsc Part 2 Online Preparation for Biology Chapter 17 (Coordination and Control)

Online Short Questions For Chapter 3 "12th Class Biology Chapter 17 Short Questions Preparation "

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Biology - 12th Class Biology Chapter 17 Short Questions Preparation

Question # 1

What is chlorosis?

  • Ans 1: Yellowing Of plant leaves due to deficiency of chlorophyll is called chlorosis.It may be due to deficiency of nitrogen, magnesium or when plant is kept in dark for long time.
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Prepare Complete Set Wise Questions For Chapter 3 "12th Class Biology Chapter 17 Short Questions Preparation "

12th Class Biology Chapter 17 Short Questions Preparation - Set 1

Question # 1

What is chlorosis?

  • Ans 1: Yellowing Of plant leaves due to deficiency of chlorophyll is called chlorosis.It may be due to deficiency of nitrogen, magnesium or when plant is kept in dark for long time.
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12th Class Biology Chapter 17 Short Questions Preparation - Set 2

Question # 1

What is chlorosis?

  • Ans 1: Yellowing Of plant leaves due to deficiency of chlorophyll is called chlorosis.It may be due to deficiency of nitrogen, magnesium or when plant is kept in dark for long time.
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12th Class Biology Chapter 17 Short Questions Preparation - Set 3

Question # 1

Compare photoreceptors with chemoreceports.

  • Ans 1: Chemoreceptors These are sensitive for chemical changes.These are for smell,taste and for blood carbon dioxide and oxygen,glucose,amino acids and fatty acids(receptors in hypothalamus)
  • Ans 2: Photoreceptors Electromagnetic receptors or photoreceptors respond to stimuli of light for example in eyes,rods and cones
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12th Class Biology Chapter 17 Short Questions Preparation - Set 4

Question # 1

Give role of human gut as endocrine tissue.

  • Ans 1: Human gut act as endocrine gland. Important hormones produced by gut are Gastrin: This hormone is produced by mucosa of pyloric region of the stomach. It stimulates the production of gastric juice. It produced under the influence of protein in the food.
  • Ans 2: Secretin: It produced from the duodenum when the acidic food from the stomach touches its lining. Affect the pancreas to produce and secrete pancreatic juice and also affect rate of bile production in the liver.
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12th Class Biology Chapter 17 Short Questions Preparation - Set 5

Question # 1

Name the synthetic auxin used as selective weed killer.

  • Ans 1: 2-4D (2,4 Dichlorophenoxy acetic acid)is selective weed killer.
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12th Class Biology Chapter 17 Short Questions Preparation - Set 6

Question # 1

What are the function of parathyroid glands? Or What are two functions of parathyroid gland?

  • Ans 1: Parathyroid gland produces paratharmone which control calcium level in the blood.Its over activity cause demineralization of bones while under activity cause muscular tetany.
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12th Class Biology Chapter 17 Short Questions Preparation - Set 7

Question # 1

Define Nissl's Granules.

  • Ans 1: Nissl's granules which are groups of ribosomes associated with rough endoplasmic reticulum and glogi apparatus for protein synthesis,present in cell body of neuron.
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12th Class Biology Chapter 17 Short Questions

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