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 "

Try The Short Questions For 12th Class Biology Chapter 17 Short Questions Preparation

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Biology - 12th Class Biology Chapter 17 Short Questions Preparation

Question # 1

Define biorhythms and gives its types.

  • Ans 1: In living organisms the behavioral activities occur at regular intervals which are called biorhythms.
    1. Circannual rhythms (365 days)
    2. Diurnal rhythms (24 hours)
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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

Define biorhythms and gives its types.

  • Ans 1: In living organisms the behavioral activities occur at regular intervals which are called biorhythms.
    1. Circannual rhythms (365 days)
    2. Diurnal rhythms (24 hours)
Submit

12th Class Biology Chapter 17 Short Questions Preparation - Set 2

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 3

Question # 1

What is reflex action?

  • Ans 1: Reflex action is a type of involuntary action.The direction of stimulus is from receptors to sensory neuron to associative neuron and then through motor neuron to the effectors.
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12th Class Biology Chapter 17 Short Questions Preparation - Set 4

Question # 1

Write a note on Alzheimer's disease.

  • Ans 1: It is characterized by decline in brain function.Its symptoms are similar to those of dememntia(memory loss).There is genetic predeposition to the disease in some people.So it runs in families.
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12th Class Biology Chapter 17 Short Questions Preparation - Set 5

Question # 1

What is chlorosis? How it is caused/

  • Ans 1: Yellowing of plant leaves due to deficiency of chlorophyll is called chlorosis it is caused due to the deficiency of magnesium.
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12th Class Biology Chapter 17 Short Questions Preparation - Set 6

Question # 1

Give the functions of androgens.

  • Ans 1: In human males androgens cause the development of secondary male characteristics. In females its excess secretion may cause the development of male characters.
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12th Class Biology Chapter 17 Short Questions Preparation - Set 7

Question # 1

Differentiate between nerve impulse and saltatory impluse.

  • Ans 1: Nerve impulse Nerve impulse is a wave of electrochemical changes which travels along the length of the neuron involving chemical reactions and movement of ions across the cell membrane.
  • Ans 2: Salutatory impulse In myelinated neurons the impluse jumps from node to node this is called saltatory impluse.
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12th Class Biology Chapter 17 Short Questions

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